I'm not deluding myself about anything. The choice isn't "vote for or against genocide" it's "act to get less or more genocide". It's not a false dichotomy; if you're not voting to defeat Trump, then you're acting to get more genocide.
By not acting to defeat Trump, you're enabling genocide more than Biden ever has.
Naturally it would be preposterous for him to be on the ticket for President, but the reason they continue to let him run for Congress is because he counts towards the Dems in terms of determining which party has the majority and therefore sets the agenda for that chamber of Congress. Without him, that particular part of WV would almost certainly go to the GOP and tip control of the Senate firmly in their favor.
It's a deal with a devil, and one that has burned the Dems more than once. But without him we'd probably be completely fucked.