People who think this way are either behaving irrationally or don’t understand electoral strategy. I will always vote for the better of the two candidates in the current system. If it was Trump vs Hitler, well damn, I guess I’m voting for Trump. It’s not an endorsement of anyone, it’s simply a matter of how to minimize the harm of the current system.
By the way, Trump supports genocide more than Biden, so if that’s your key issue, you should vote for Biden.