It’s not much, but at least Biden is malleable on this. He can be persuaded to make the attempt to try to slow the Israelis down, maybe even stop arms shipments to Israel altogether (or at least add conditions). If Trump comes in, he’d probably go in the complete opposite direction out of spite for liberals and would try to help the Israeli genocide even harder. It’s not a great choice, but the choice of least harm in this case is still Biden.