Israel's an ally and America doesn't exactly have the moral high ground to stand on cutting off israel for terror bombing civlians in the middle east.

More practically, Biden seems to think he can negotiate more from israel by playing at being on their side in this conflict than by joining the international condemnation against them, and to his credit he has achieved concessions from israel in the hypothetical post war, and managed hostage swaps between israel and hamas.

Lastly there's the old saying about never letting a good crisis go to waste, the houthis have gone and made absolute asses of themselves with their red sea blockade over this war, and the US and KSA MICs are both explosively orgasmic at the campaign against them going from being labelled a humanitarian disaster to suddenly being a borderline service to the international community.

The longer Israel keeps it up, the longer the Houthis keep making everyone hate them, the longer MBS has to wipe what he sees as one of his biggest security threats off the map without catching flak from most of the international community. You could almost argue that Israel and KSA are passing the "everyone hates us!" ball back and forth to cover for each other's designs on complete subjugation of their immediate neighbors.