Israel’s air force is destroying every air defense system, missile stockpile and air asset they know about, while the Jihadis whine that they aren’t Israel’s enemy.
By doing so Israel makes sure that it doesn’t matter who’s in charge of Syria: they can hit anything they want at any time and not only can’t Syria defend itself, they can’t even strike back. (Hezbollah can’t defend against air strikes, it can strike back so has some deterrence, but not enough.)
Turkey should just cut bait and directly conquer and annex Syria. Operating thru proxy forces has too many disadvantages and the days when borders were nearly sacrosanct are over. The US won’t like it, but so what? They can’t cut Turkey loose, it’s too important, and they’ve already pissed Russia and Iran off.