Because America isn't going to go support the partition of Iraq. America has spent too much time, money and energy into maintaining Iraq as one country. That was the whole reason they went to war with Saddam (as they'll often say) in the first place.
Not only that, but will America really risk pissing off the Turks and Iranians? Will they really risk causing more problems in an already unstable situation, let alone region?
I think what will happen is that the Kurds will declare independence, but won't get the support they need, and they'll end up claiming the West betrayed them a la Poland in WWII.
I just don't see it happening, at least not without full scale bloodshed. I'm talking war, real war, not this ISIS vs non-ISIS militia stuff.


) Begum, who took her five children to Syria to meet her jihadi husband, gives her first interview about life in the so-called Islamic State