As far as I know, the Oval Office doesn’t have start/stop genocide button, or control inflation lever for that matter.

If it’s not going to be Biden, then it will be someone else. Either a Republican or a Democrat.

Even someone who earlier looked promising, eg Fetterman is a staunch Israel supporter.

Because the problem is systematic. You can’t just uproot the US-Israel nexus that’s deeply entrenched in the US politics.