Some people argue that Israel is an Apartheid state.[1] Why should “we”/you(plural) engage with that?
[1] Chomsky argues that even that is a compliment https://www.commondreams.org/views/2022/07/03/chomsky-israel...
They are such a great ally, they have done all those great things. Like in the Golf War 1, when they did literally nothing and they were the biggest hindrance to forming a coalition. Or that time where they broke all agreements with the US and made a 2-state solution practically impossible. Or when a war they started led to mass radicalization, that motivated directly motivated the 911 bombers to join AQ. Or when top level Israeli officials literally said they preferred ISIS and certainty wouldn't help much defeating them, bombing the forces who were fighting ISIS.
Israel is such a great ally, they really have earned unending friendship and support. They are not at all like other nations in the middle east.
Disengaging or virtue signaling would be a mistake. The world is filled with unpalatable regimes that the US needs to handle somehow.
Frankly, if we follow your attitude to its natural conclusion you'd disengage from most of South America, Asia, Africa, and Eastern Europe.
And the Saudis are rightfully panicked about this ever happening and Israel-Saudi alliance spend absurd amount of money in Washington, including think-tanks, employing generals, paying politicians, producing fake intelligence, grand standing and many other methods to make sure not even a slight change in position towards Iran is ever allowed.
As the US, literally putting yourself in the position where you have no other choice then being somebodies little toothless bitch isn't actually good realpolitk. Letting Saudi money so directly influence US politics is idiotically dumb in fact.