It's not about islamism, it's about power. Musk has met Erdogan in person multiple times, and took his son to meet him when he came to the States. How many other heads of state did Musk take his son to meet?
Musk's whole schtick is quid pro quo and thin-skinism. He complains about Chinese EVs, then dashes on a jet to fly to China to meet Xi and scores a deal for Tesla -- no more whining about China. He publicly entertains Jewish conspiracy theories, claims he's pro peace in general, then gets on a jet to meet Netanyahu and the next thing you know he's clapping Netanyahu's speech in Congress.
His whole transition to his current persona can be traced to when is son announced their own transition and disowned him. His bumbling political outbursts are all self-serving garbage all the way down.