If you are a true friend you dont instigate a bloodbath to your friend.
Israel vs Iran war will have a cost in Israeli people lives.
USA have enough economic power to avoid that war and persuade Iran by money.
But USA precisely exclude Israel from Iran Deal negotiations.
USA is not interested in Israel security anymore.
We live in a world with limited raw materials and energetic resources since 2008.
Big wars in Eurasia, including Middle East, are a good thing for USA, no matter who wins. Just destruction, mayhem and decrease conssumption, like Iraq and Libya.
Israel was important for the US when they had their main interest in this region, especially in the cold war time, as a counterweight to Soviet influence and their usage of the Arabs.
It's easier to let Sunnis and Shia slaughter each other, than all Sunnis concentrate on US outpost Israel, supported by Saudi oil money.
Saudi were main sponsor against Israelis until Iranian revolution, then swapped to fight Shia Iran.
Israel MUST SPEND 74-76% from US aid into US made products. So it goes back into the US (most don't understand that LOL) and was even blocking good Israeli companies to survive bc buying US products was easier (much corruption from Jews against their fellow jewish-owned companies), army boots as an example.
Most Muslim countries who get US aid are still against US and chanting death to Murrica/Israel and burning their flags, except producing anti-US "terrorists" or real terrorist they don't do anything for the US.
Israel saves money for US.
Israel saves up to 150k US soldiers in this region. From Mossad help I don't wanna start...
For the improvements on F-15/16 it's insane how much money US saved by let the Jews do it...
"As of September 2018, the active duty component of United States Army consists of 31 brigade combat teams:
14 infantry brigade combat teams (including airborne brigades)
10 armored brigade combat teams
7 Stryker brigade combat teams"
Even if all brigades would consist of 5k per brigade (which they are not), REGULAR Army would use all soldiers in that region to have same effect as Israel (as a whole).
Now US has lost it's monopoly 90s-2010s, Russia is "strong" again and China is a fully grown dragon who is still being fed, especially by greedy West.
Israel goes down the toilet in the next 2 decades, especially bc they have become soft.
ISRAELI Arabs (who showed their "loyalty" to Israel 2021) are breeding them out and the only Jews who make many babies are the ultra-orthodox, who are often racist against non-Jews BUT don't like israel either, they wanna breed, don't work, don't join the IDF.