What levers of decisionmaking are manipulated by whom
I hope you aren’t saying what I think you’re saying here.
In any case, the main reason for western support of Israel is the same as the reason for western support of Turkey. Both have obnoxious leadership but both are in key geographic locations, and the value of having them on-side against their neighbours is greater than the value in cutting them loose.
Americans stop making everything about the US challenge (impossible)
You know most other western countries support Israel too, right?