Trump would be a disaster for the middle east. He wouldn't even be good for Israel. Sure, he'd support Israel now, but Trump loves strongman leaders, and there are plenty of them in the middle east, so he'd love Netanyahu, but he'd probably also cozy up to any other regional strongmen and destabilize things even more.
But, the Biden/Harris admin has been effectively sponsoring the genocide by giving military aid to Israel. It's clear that Israel is the biggest military power in the region, and it has been for decades. It has no need for military aid. The best way to help civilians is to make Israel afraid to piss off its neighbors. Right now it's convinced it could beat them in any war, so it's happy to grind the Palestinians into dust, daring Iran, Egypt, etc. to interfere.
Yes, it's a complex geopolitical issue, and an all-out regional war would put many more civilians in danger, not just the Palestinians. But, giving military aid to Israel while they engage in genocide isn't a good way to prevent a regional war.
Even if you're a single-issue voter who doesn't care about women's reproductive health, doesn't care about the rule of law, doesn't care about free speech, doesn't care about corruption, and is only 100% focused on the fate of Palestinians, even then you should be voting for Harris. Even if you don't like her policies, there's still a slight chance she'd listen to reason once elected. Trump would be an utter disaster.
That may be, but currently those neighbours pose very little danger to Israel, so Israel is free to do things like settle in occupied lands and more recently, flatten Gaza and kill tens of thousands of Palestinians.