To answer your first question, the attempted coup. Biden didn’t encourage and rally his supporters to storm Congress. He doesn’t have the backing of white nationalists and neo-Nazis. Trying to seize power domestically via a group of fascists is more domestically fascistic than not doing that.

Also, even if Trump suddenly becomes a leftist ally and pulls out all U.S involvement in Israel, they’ll still be genociding Palestinians. You can’t put literally 100% of the blame of the Palestinian ethnic cleansing on the U.S, when it was actually started originally by British imperialism and is perpetuated by the terrorist state of Israel.

Voting for Trump as a vote against fascism seems wildly misinformed to me. The first Trump presidency already stacked the Supreme Court enough to overturn Roe. If he becomes President again, it’s well within the realm of possibility that he pardons Jan 6th offenders, pardons himself, and they seize power permanently in the U.S.

I get your hope that while we’re all being subjected to a new fascist dictatorship, that somehow his pure leftist heart changes the behavior of the imperial core and we pull out of Israel, but even if that happens Palestinians will still be genocided. We’ll just also have more sociopolitical regression (gay/trans people will be outlawed, the bit of social services we have will be gutted, capitalist exploitation will reach new heights, etc.)