PKK, ideologically, is not a zionist group. Öcalan himself called out Israel many times. They are ideologically leftist-communists and they even cooperated with PLO in the past. However, especially in Syria, they developed a pragmatic partnership with the USA&Israel thinking that they could establish a statelet there. Turkish state is aware of this fact and they used Öcalan to take PKK away from the Israeli influence. Hence, their plans collapsed.
The ones that are eager to cooperate with Israel are Kurdish nationalists and they are against the ongoing process. Just check twitter to see the ongoing disputes between Kurdish nationalists, PKK suporters and KDP supporters. Sometimes I feel sad about our people's ignorance about our enemies.
Show us a single "islamist" that supports PKK, says "sayın Apo" and rejects the existence of Turks. I'm begging you to show me who that person is.
Btw, Karabagh was saved by the "islamist" government, with the drones they produced, generals they appointed and plans they made.
(I don't think current Turkish state is islamist btw. I'm just countering your imaginary islamist problem.)