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.
Well, Trump and Biden are not substantially on different sides. They are two faces of the same side. If the parties were on substantially different sides, there would be some kind of actual holding accountable from the one to the other and preventing things from getting worse. Instead, what we get is blame directed at "the left" (a vague amorphous blob buzzword in these situations, similar to "tankie") for wanting anything different from the status quo. The democrats continuously show a near total lack of interest in doing anything about the depravity that they say the republicans are doing, even going so far as to do much the same things (if not worse) but with different PR branding, and then shame people for correctly understanding this means that neither party is meaningfully better.