Also, Israel is much much less reliant on the US for aid than in times past, and I think there’s a fear that if we stop supplying them, somebody else will and then we’ll have absolutely no influence over anything they do.

It seems like the prevailing narrative tries as hard as it can to bury this fact. Unilaterally withdrawing aid doesn’t magically make Israel stop what they’re doing, they can easily get support elsewhere. All unilaterally withdrawing does is throw away our only real bargaining chip to try and nudge them toward ceasefire.