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.
Every single comment in this thread has fully engaged with your question, your inability to percieve that or your ego getting in the way isnt a failure on there parts, I havent seen one take in this thread I dont agree with. Most of them are poking at the american liberal exceptionalism you're displaying, where you're presenting this topic as a A:B situation.
The most effective way to save those people wouldnt be an induvidual act of pulling the lever, then running to untie the millions of tied down people. Its organizing into a large collective and dealing with the problem at its origin, not at its symptoms.
Break the tracks, save the people as a collective, no empty solutions that continue to perputate the endless cycle of violence.