NEW DELHI: Islamic State militants have burnt to death 45 people in the western Iraqi town of al-Baghdadi -- which fell to the militants about a week ago. The fall of the town is of importance as it is located just 8 km away from Ain al-Asad air base, where 320 US Marines are training members of the Iraqi army's 7th Division. The base itself was attacked on Friday, with Iraqi troops backed by US-coalition forces repelling the attack.

The fall of al-Baghdadi is significant because -- in addition to its strategic location close to the air base -- it was one of the few towns that had remained in the control of the Iraqi government in Anbar province, where the Islamic State has established a stronghold. It’s fall also indicates that despite US-led airstrikes and intensified military offensives, the militant group is still strong enough to gain new ground.

The burning of people in the captured town, a majority of whom officials believe were security personnel, follows the burning alive of a captured Jordanian pilot. The group has usually used beheadings as a means of execution, with burning to death seeming to be a new barbaric execution method.

It also follows the brutal execution of 21 Egyptian Coptic Christians on a beach in Libya -- recorded on video and released by the group.

Meanwhile, Iraq on Tuesday told the United Nations Security Council that the Islamic State has committed genocide. “These terrorist groups have desecrated all human values. They have committed the most heinous criminal terrorist acts against the Iraqi people whether Shi'ite, Sunni, Christians, Turkmen, Shabak or Yazidis," the country’s UN Ambassador Mohamed Ali Alhakim said. "These are in fact crimes of genocide committed against humanity that must be held accountable before international justice.”

Whilst the barbarity of the Islamic State is an established fact, the reality in Iraq is far more complicated that a mere “Islamic State versus the rest-of-Iraq” rendering can do justice. Iraq, in reality, is plagued by death squads and rival militias, each more brutal than the other.

A good example to elucidate the above point are the Shia militias that are backed by the Iraqi government and the US and its allies. A report by Amnesty International (AI) titled “Absolute Impunity: Military Rule In Iraq” notes that “ recent months, Shi’a militias have been abducting and killing Sunni civilian men in Baghdad and around the country. These militias, often armed and backed by the government of Iraq, continue to operate with varying degrees of cooperation from government forces –ranging from tacit consent to coordinated, or even joint, operations.” Reports have emerged of civilians -- who are labelled “IS sympathisers” because of their sectarian identity -- being arbitrarily arrested and executed without trial, their dead bodies hung from power lines to instill fear in the local community.

The fact that these are the “good guys” is indicative of the widening crisis in Iraq.

Further, whilst sectarianism has certainly contributed to the rise of the Islamic State, the fight against the Islamic State in its current form is only widening sectarian rifts. The same example of state-backed and US-coalition backed Shia militias pitted against largely Sunni Islamic militants is again, indicative of this fact.

And while the US was right to blame the previous Iraqi Prime Minister, Nouri-al-Maliki and his administration for pursuing divisive politics, using Maliki as a scapegoat and pronouncing a new government that was formulated after his dismissal as “inclusive” is reflective of the continuing emphasis on superficial solutions.

In fact, the US has played an instrumental role in Maliki’s rise to power in the first place, in addition to consistently supporting Iraq’s divisive politics. This includes siding with the Iraqi government’s military crackdown on Anbar last December and the decision to clamp down on protests in Falluja using the rouse of “anti-terrorism.” Falluja was the first city to fall to IS militants at the beginning of this year.

More importantly, whilst sectarianism is certainly a factor in the rise of IS -- through which the discontent in Iraq has channeled itself -- it is a factor that was not all that important in Iraq prior to the US invasion of 2003. When the US invasion toppled Saddam Hussein, a need emerged to replace the security vacuum with a new political elite. The main opposition to Hussein at the time were ethno-sectarian parties, and the US brought these factions to power cementing identity politics in the region.

Fanar Haddad, of the Middle East Institute in Singapore, points out that the politicians who came to power post 2003, were not politicians who happened to be Shia, but rather, Shia politicians with a fundamentally Shia-centric ideology and political outlook.

Further, post 2003 institutions came to be organised along sectarian lines. For instance, the Iraq Governance Council, which served as the provisional government of Iraq from July 13, 2003 to June 1, 2004 was formed along ethnic lines -- comprising of 13 Shias, five Sunnis, five Kurds, one Turkmen and one Assyrian.

In today’s Iraq, the Prime Minister is a Shia, the speaker of Parliament a Sunni, and the President a Kurd.

This creation of identity-based politics, paved the way for sectarian identity to become a key political factor. Prior to 2003, although a limited notion of a Shia identity and a Kurdish identity did exist in Iraq, there was no concept of a homogenous Sunni identity. The divisive policies of the Iraqi state -- facilitated by the US -- have paved the way for the emergence of a Sunni identity.

It is this emergence of a Sunni identity rooted in the notion of victimhood, that made the emergence of IS in Iraq possible. The group has existed under various names, first coming into existence in early 2004 as the Jam??at al-Taw??d wa-al-Jih?d, or "The Organization of Monotheism and Jihad" (JTJ). The founding ideology of the group was based on resistance to American intervention in Iraq, with foreign fighters allegedly playing a key role in the establishment of its network. At this point, the group was led by the late Abu Musab al Zarqawi.

The group soon after swore allegiance to Osama Bin Laden, and changed its name to Tan??m Q??idat al-Jih?d f? Bil?d al-R?fidayn, or "The Organization of Jihad's Base in the Country of the Two Rivers.” At this point, the group came to commonly be known as “Al Qaeda In Iraq” although it never formally went by that name.

In 2006, the group merged with a number of other militant groups, to form the "Mujahideen Shura Council," which later that year, following the death of Zarqawi at the hands of US forces, organised itself into the “Islamic State of Iraq” (ISI) or the Dawlat al-?Iraq al-Isl?m?yah. It was in this year that the group made some key advances, securing the Dora neighbourhood in southern Baghdad.

In 2007, it is estimated that the group killed over 2000 civilians, targeting Shias specifically in its onslaught. In June 2006, ISI killed 13 people at a meeting of Al Anbar tribal leaders in Baghdad, saying that the attack was in response to the rape of a Sunni woman by Iraqi police.

In 2009, the group claimed responsibility for the October Baghdad bombings, in which 155 people were killed, and the December Baghdad bombings, wherein 127 people died. The group followed these attacks with a January 2010 bombing that killed 41 people, an April 2010 bombing that killed 42 people, an August 2010 Baghdad bombing, and a December 2010 Church attack. It continued bombings in 2011 and 2012, during which time it began making inroads into Syria. In June 2013, the group attacked prisons at Abu Ghraib and Taji in Iraq, freeing several hundred prisoners.

In Syria the group began consolidating itself the city and province of Raqqa, expanding into northwest areas of the country. In September 2013, the group overran the Syrian town of Azzaz, with the Syrian Observatory of Human Rights labelling the group as the “strongest group in Northern Syria” by November 2013.

As the group expanded from Iraq into Syria -- establishing a stronghold in Ar-Raqqah province -- it renamed itself the "Islamic State of Iraq and the Levant", or the "Islamic State of Iraq and al-Sham” in 2013, under the supervision of its current leader, Abu Bakr al-Baghdadi, who took over in 2011. The name change was based on the Baghdadi’s intent to merge ISI with the Syria-based Nusra Front. Nusra Front and Al Qaeda leaders immediately rejected the merger.

The group has often been referred to as an Al Qaeda off-shoot, but the exact nature of its relations with the Al Qaeda are not clear. In recent months, both groups have made statements disassociating themselves from the other, with ISIL leader Al-Adnani saying, ““the ISIL is not and has never been an offshoot of Al Qaeda.”

When the group captured Mosul in June this year, the international community was taken by surprise at the strength of a relatively unknown Iraqi group. IS’ gains in Iraq are directly linked to its operations in Syria, where it had come to control large swathes of territory in its fight, along with other groups, against Syrian President Bashar-al-Assad.

The advance of anti-government forces in Syria, was made possible in turn, by the United States and allies assistance to Sunni rebels, who share with the US the objective to topple Alawite leader Assad. The US greenlighted Turkish and Saudi aid to anti-Assad rebels, supplied these groups with material and financial assistance, and used the CIA to train rebels at a secret base in Jordan.

This not to suggest that the rebels in Syria present a homogenous group, as there is considerable infighting, with the IS militants facing setbacks at the hands of the Islamic Front and the Free Syrian Army, for instance. However, affiliations change rapidly, and the IS group -- when it was known as Al Qaeda in Iraq -- had expressed solidarity with the rebels in Syria, following which the US immediately increased aid to anti-Assad forces. The aid began as non-lethal aid, but following a June 2013 White House statement that said there was reason to believe that Assad had been using chemical weapons against rebels, the US decided to extend lethal aid to anti-Assad militias. The total aid given by the US to rebels in Syria, according to USAID figures, amounts to over $1 billion.

For FY2015, the US Congress is reportedly seeking $2.75 billion in funds to finance its role in the Syrian crisis, of which $1.1 billion is marked for humanitarian aid, $1 billion for regional stabilisation and $500 million for DOD-led arming and training of opposition forces.

The United States’ dual policy -- of complicit support and aggressive resistance, simultaneously -- has shaped the new Middle East, which in turn, is characterised by the factors that are invoked to explain IS’ rise: growing sectarianism, the absence of an Arab governance model, and an emerging security vacuum in the region.