Just to clarify, %20-25 of the population is Kurdish in Turkey. In elections, PKK affiliated legal party gets half of the Kurdish votes and other half goes to Erdogan roughly. So, there is no single Kurdish identity in Turkey, more like split between these two. Ofcourse, there is a few percent which is not among these two. So, if you ask is there any Kurdish people in the government, yes there are a lot. Erdogan gets half of the Kurdish votes, so we can say Kurdish Erdogan supporters have enough representation. PKK affiliated party is not in government, because they didn't get enough votes but they are in parliament ofcourse representing their %10 votes.

I don't think PKK cares about Erdogan's Islamic Turkey dream. You don't see PKK or it's legal party saying anything about it in Turkey, I think they mention it only when they are talking to western media :)

In Turkey, there is secular opposition which is rougly %40-50, they stand against Erdogan's Islamic push but they still lack of %50 + 1 votes to dethrone Erdogan unfortunately.

PKK says they want federalism for Kurdish cities, you can advocate for that, it's okay, their legal party is doing that, that's fine. But when you're holding guns and saying my way or high way, that's a big no. So, if they really care about democratic, secular Turkey, they can put guns aside, get together with opposition in Turkey.