This is all about accurately assigning blame and not lapsing into comfortable mythologies about how our political faves are heroes of history so we have a chance at fixing the problem moving forward.
I don't know where you're getting that the uncommitted movement is unwilling to apply pressure to the Trump administration when the Trump administration doesn't even exist yet. The man will not be sworn in until next year, Joe Biden is the current President of the United States. And they didn't endorse Donald Trump, so I don't know where you're getting that they were advocating voting for him. You're telling on yourself with these assumptions.
But I repeat, you can only apply pressure at vectors susceptible to pressure. The Republican Party is not on its face a political project ostensibly dedicated to human rights and Liberal values, so they face no threat of hypocrisy from pursuing evil, genocidal policies. It's the Democrats who have a softer underbelly that can be prodded by appeals to human rights, even if those appeals are ultimately subsumed by more powerful interests in the Democratic coalition. There are other, non-direct vectors of protest pressure that can be applied during Republican administration. But y'all keep asking Palestinian rights protestors to bang their heads against the wall of MAGA because you don't actually care about any underlying issue or creating positive change, it's all just a game of elections to y'all. If Harris won and her administration took the exact same positions Trump's will take, it would be silence from y'all.