Two things can be true. Even if Israel were an aggressor (I don't agree with that statement, but that's irrelevant), Turkey also is one, and that's not even controversial.
On top of that, Erdogan's Turkey is also a bad faith actor and disloyal to the alliance. It's arms dealings with Russia are the cherry on top of a string of vetoes and boycotts with absolutely everybody, from Egypt to the Emirates, to even defensive deployments to protect Poland and the Baltics, which are supposedly the most sensitive front of the alliance.
Turkey is a bad actor, all around, and nobody would move a finger to "help" them.