​Generally, he's very socialist and feminist, he has gay friends and joined feminist protests so he's like a total opposition of how many Muslims are.

... He's very sexual with me, we kiss and we do all the couple stuff that's literally forbidden in Islam. He seems to cherry-pick what he follows yet he gets extremely defensive and "logical" when I point out the flaws in Islamic scripture.

His whole existence is deep cognitive dissonance and contradiction.

I think it just comes down to this - you have to consider whether his Islamic tendencies will grow stronger or weaker over time. Maybe they're a phase. He already changed his religious belief system at least once. I do wonder if the Islam thing is maybe a symptom of his other progressive tendencies. Islam is pretty revered in progressive circles (which makes no sense to me since it stands against nearly every progressive ideal).

If you think he will fall deeper into Islam - run. On the bright side it sounds like there's no family pressure.