I don’t think Bolton is being sincere about his expressed desire for an independent Kurdistan.
He wants Iraq broken up, he wants Erdogan’s power in Turkey to be checked, he wants Iranian hegemony in the region curtailed.
The Kurds are just a means to an end for that agenda.
Kurds are Sunni Muslims. They are surrounded by Shi’ite Muslims. The two sects will kill all non-Muslims, then turn against each other as the ‘true’ Islam. So it’s not a civil war. It’s a religious war.