The vast majority of Kurds follow a form of Islam. They are 100% preferred (by me) to the Turks and others that they fight. That said, they DO fight them. I also think they’ve been treated very badly by the US but still like us.
That said, I’d rather KEEP THEM THERE.
If they had their own nation or state in a federation, why would they want to leave?
The percentage of non-muslim in the Syrian Kurd region is much more than you think. It does vary with city or area.