It's also in my experience the most terminally online leftists are the ones going online complaining about other people not voting instead of like actually doing organizing. I certainly don't see a lot of them outside the internet or when doing things that actually matter instead of putting a piece of paper in a box thinking it changes anything.
I think you're forgetting that Trump was the one that pushed for and moved and the US embassy in Israel to Jerusalem and then formally recognised Jerusalem to be the Capital of Israel in 2017 against tons of pushback. He was actively instigating this.
I don't think that's any indication of the degree of genocide he would support. The precedent is clear, if you're president of the USA you 100% support Israel and anything Israel does.