Who could have guessed Trump would appoint somebody who doesn't recognize the victims of genocide as real people? It's not like Trump called pro-Palestinians protestor "pro-Hamas thugs" and "jihad sympathizers" or said "I will give Israel the support that it needs to win but I do want them to win fast" or called attempts by Biden to negotiate a cease fire an attempt to "tie Israel's hand behind its back".
How could anybody have known? By looking at how he handled conflicts in the area during his first administration? What are we? A nation of nerds that try to make educated decisions about our political leaders?
What real difference does this make though? I honestly don't see what actually is going to change in Gaza. Yes, Biden isn't overtly racist against Palestinians, but he doesn't consider them human beings either. He's given Israel a complete blank check to do whatever they want. And I expect that to continue unchanged under Trump. As a practical matter, I really don't see what Trump can do that Biden already hasn't. Trump will just be a lot ruder about it.