They want, maybe even need Trump to get the US in a war there to erode his popularity in the US so he is not re-elected in 2020. Can guarantee you that the Israelis will get all the flyover latitude they want from the Saudis.
During one of my meetings last week, in Brisbane, met two Iranian ladies (both Ph.D's in Petroleum engineering) and they hate the current regime in Iran and say that there are millions who feel the same way. They along with their husbands and kids immigrated after the Green Revolution knowing that the US in particular and the world in general, was never going to anything about the Mullahs. Not many kind words for the ex-rodent in chief either and their opinion of the money the first wookie's wife sent has only strengthened the regime and its adherents.
Never do with ground troops what you can do with a few thousand cruise missiles.