He joined Al-Qaida when he was young, during the US invasion of Iraq, and spent years in a US prison where he grew his network, link to a particular faction of Al-Qaida that isn't that religious (ok, Islam is weird and way too hard to explain in a digression, let's leave it at 'not that religious' to avoid a 500 lines tunnel).
Kurds were extremely skeptical at first, but it seems at least some are happy with how things are proceeding (they are more involved than expected in drafting the new constitution that will take place in 2030).
It might sadly go to a dual government like Iran use to have before 2026, which is hurting my atheist self, but let's be honest, a dual government in the region is way, way more democracy than expected.