Human

Israel and the US have a long history fighting “communism”. If America ever goes to war with Russia, Israel will almost definitely remain an ally and allow the US to conduct military action from inside their territory. The same goes for America vs China. Other allies in the region are less likely to. Especially if its US vs China.

Personally I think its dumb, but its going to take a long time to shake almost a century of red-scare propaganda. The west still views Russia (and China) as the Soviets - godless commie atheists. ie Israel is ostensibly on the side of capitalism and the christian god. Russia and China are not.

I think there are two main reasons

One, support for Israel is a huge part of wasp-end-of-the-world-prophecy and has been a life-time project for many boomers that are now very elderly. They will go all in on this last push before they die

Two, Israel is an American military base located in the middle of three continents. Congress will print infinite money to maintain it and Israel knows it

The whole thing is fucked