We know where Trump does too. Only difference is he's explicitly stated his support for the genocide while Harris weasels around language like that.
He's no better on Iran either, recently threatening to "blow them to smithereens".
Both seem to have the same net result though? I am willing to accept as a hypothetical that things there could be worse under Trump, but I struggle to see how. Israel has now invaded a sovereign nation and twice turned their guns on UN peacekeepers. Biden (and now Harris) have both publicly called for restraint, but there are indications that privately they're more deferential and, irrespective, are unwilling to stop arming Israel to carry on (and, in fact, have bombed Yemen to assist Israel in carrying this out).
Trump is publicly encouraging Israel, it's true, but it's the same net result - a belligerent, allegedly genocidal state dangerously spreading a war. To not reward anyone who supports this, openly or not, mightn't be the choice everyone concerned makes, but it's not an irrational one.