According to polls, Palestinians living as Israeli citizens do not support living under Palestinian rule. People who are doing well financially tend to have fewer children and have higher aspirations for them; like college or professional careers. If you have the traditional twelve to eighteen children you simply can’t afford to send any of them to college. Also, give people a few luxuries and they tend to have fewer children to afford even more; a bigger car, actual vacations, etc. It will be a while before wealth starts reducing the Kurdish birth rate.
But let me add two details -- sorry, no time for links, google and you should find.
1. Pal's fertility is down, Israeli fertility is up, they are very close now. So no Pal majority on the horizon now.
2. Just like with Pals/Israel, majority of Turkish Kurds do not support PKK or a separate Kurdish state.
Of course, all of this may yet change, but for now Turkey is not in immediate thread.
But here is a curveball: if Turkey adds N.Syria, it will get 10% of the Syrian population that are Kurds. None of them will be sympathetic to the Turkish rule. Thus my doubts about the Turkish intentions to really annex this area.