The notion that Biden represents a lesser evil compared to the chaotic reign of Trump is a common argument. However, we must not forget that there exists a moral threshold below which neither choice is acceptable. To suggest that enabling a literal genocide can be considered a lesser evil is a morally bankrupt stance.
Saying that voting for Biden is a moral obligation to prevent the return of Trump perpetuates a dangerous fallacy. It implies that the democratic party is immune from scrutiny and accountability, no matter the atrocities they commit. This line of thinking allows for a never-ending cycle of justification, as long as there's somebody considered worse, the democrats are granted a blank check. This is nothing more than a form of gaslighting, manipulating the public into believing that their only choice is between two evils, rather than demanding a better standard of leadership and true representation.
It's a good example for the reasons you outlined but it's also so recent that we all pretty much have living memory of the dems flipping on the issue. There are plenty of other historical examples though, such as the civil rights movement. Standing on the sidelines and until the last moment and then pretending they were always in the fight. Since libs love their pop culture references I'm gonna say that the modern careerist Democrat is the equivalent of Walder Frey from Game of Thrones. I don't know Harry Potter enough to do one of those comparisons.
When in doubt, just call them all Dolores Umbridge
Jk, that's just Hillary
Ok, I'm done baiting libs.
I think the centrist politician who ends up just doing evil is the Minister of Magic Cornelius Fudge who pretends to be totally oblivious to all the shit going on until literally wizard Adolf Hitler is alive again in front of him.