Israel gets it's way a LOT! Even with American backing Israel cannot get it's way every single time though. Sometimes it is a matter of making an adjustment to Israel's priorities. Quite often we see cases where Israel makes a preemptive move tagainst a potential threat which only results in an increased threat. One example is Israel's assassination of Nasrallah's predecessor. He was far less capable than Nasrallah. He was easily assassinated by Israel (along with his family) which brought Nasrallah to power. This was the cause of Israel losing both wars in Lebanon. Today, even after bloodying Israel's nose several times, Hizbollah is more powerful than ever before thanks to Nasrallah. Nasrallah himself can thank Israel's actions for the chain of events which brought disaster to Israel. You see how it goes? There are many other such circumstances.
U.S. says working on initiative to de-escalate Syria fighting, with focus on Aleppo (Reuters)