The TL;DR about why we didn't make little kurdistan in the US is that all the based Kurds are still in the Kurdish region, fighting for their country, since the enforced no-fly zone kept Saddam and Turkey from bombing them. The refuge Kurds are faggots who are either full-blooded turks who grew up in a Kurdish area and claimed Kurdish status for refugee processing, someone who had a Kurdish relative and saw a chance to move to a western nation, or turncoat faggots.
Kurds actually have pride in their homeland, and have fewer of the shitty tribal politics that infest arabs.
Turks are like the cream of the crop when it comes to Arabs, and Kurds are the cream of the Turks. Which is to say they are still smelly, inbred, worthless, theiving sand niggers, but almost tolerable as long as they keep to themselves (which they generally do).