Two popular mistakes should be identified and avoided:
1. It is not merely ISIS against the Iraqi army. ISIS is the spearhead and the combat wise most experienced and effective single group of a variety of Sunni militias that are fighting the Iraqi armed forces. Not all of these 7 or 8 groups are radical islamists and sectarian. Many are tribal fighters disaffected with the central government which they accuse of having sidelined, oppressed and marginalized Sunnis for years. Others are former Baathists, thus more or less secular minded or nationalists, among them the Naqshbandy army.
2. Though it is true that especially the Maliki government is highly corrupt and has acted in sectarian ways, this is not merely because Malikis regime is backed by Iran or simply hates Sunnis. While ISIS as the name of a specific organization only exists since a couple of years, the hatred ideology of takfiri salafism in post-Saddam Iraq is not that new. As early as in 2003 systematic and wide scale deadly attacks against Shia police, army recruits and especially ordinary civilians began to occur at least on a weekly basis. Suicide bombers and car bombs killed hundreds of Shia every month, targeting them in mosques, at market places, in Cafes and restaurants and even at funerals. Many Shia clerics were assassinated few months after the US invasion in 2003, e.g. Ayatollah Hakim:
http://en.wikipedia.org/wiki/Mohammad_Baqir_al-Hakim#Assassination
Not all but many instances of power abuse at the hands of Shia militias and Iraqi armed forces were a reaction to the relentless and high casualty bombings of Shia areas. Neither Iran nor the Iraqi Shia clergy brought sectarianism to Iraq. It was the „achievement“ – and not an incidental one – of Wahhabi/Salafi ideologues from the GCC countries awash in money and relying on arabic mass media in shape of several satellite channels broadcasting anti-Shia and anti-Iranian hate mongering all around the clock.
It is wrong to declare Sunni opposition to the Iraqi regime as „terrorism“ and not every Sunni insurgent fighting the Iraqi army is a takfiri. The Sunni opposition is legitimate but it suffers from being associated with ISIS and similar minded sectarian jihadists.
„Susan Rice, Obama’s national security adviser, said the US would „ramp up“ its support to the moderate Syrian opposition, Isis’s ostensible rivals for control of the Syrian resistance to Bashar Assad.“
http://www.theguardian.com/world/2014/jun/11/mosul-isis-gunmen-middle-east-states?CMP=EMCNEWEML6619I2
This shows the unending idiocy of a senior member of the US administration. Still, her only silly and unsubstantiated approach towards the ISIS or „radical islamist“ dilemma is to attempt to boost the laughable and tiny Syrian non-islamist opposition. An opposition with a phantom, „ghost“ character, hardly playing any role in reality.
The US admin fails to understand that any „ramp up“ of Syrias allegedly „moderates“ has almost definitely one of the following consequences:
a) The moderates sell or forward the weapons to the radicals who are the more battle-hardened and experienced fighters, willing to die (and kill ruthlessly)
b) The radicals which are not only ISIS, but also „Nusra Front“, „Islamic Front“ or „Syrian revolutionary front“ (and thus according to Israeli sources 80% of the rebels) simply overcome the CIA-vetted „moderates“ and take their weapons
c) Many formerly „moderates“ discover that their companions are opportunists merely interested in building themselves a power base (just like the afghan militias in the 90s) and decide to join the „real mujahedeen“
After 13 years of „anti-terror“ war, „enduring freedom“, „mission accomplished“ and other garbage, Al Qaeda and affiliates are stronger than ever, while the oh so bad Bashar al Assad and his Iranian and Russian backers have been the best powers to fight Al Qaeda.