So your current voting options are

1. The guy who is currently allowing a genocide to occur or even helping to perpetuate it, but could potentially be persuaded to take steps against it

2. Vote for 3rd party candidates or abstain from voting so that you can pat yourself on the back and say "I didn't vote for genocide" even though that option doesn't have a snowballs chance in hell of winning (no matter how much we wish that were the case)

3. The guy who is fully in support of the genocide and would very much like to support more genocides given the chance

And that's not even touching on basically every other issue where candidate 1 is also far better (or at least much less bad) than candidate 3.

Voting for 2 takes votes primarily from candidate 1, candidate 3's supporters by and large have no intention of jumping ship no matter what. So you're effectively taking votes away from the one candidate who has any chance of winning that we might be able to talk out of genocide, and allowing candidate 3 to win so he can do even more genocide.

I've voted 3rd party nearly every opportunity I've had for most of my adult life, and I hope at some point we return to some level of sanity and I can feel safe resuming that. Right now, we are faced with 2 possible outcomes, bad and cartoonishly evil, whatever thoughts you have about this being the year of the 3rd party candidate are delusional, the movement just isn't there right now, and while normally I'd be all about the idea of a protest vote, you only get the one vote, and would you rather use it to send a message, or to actually avoid the worst outcome?

Perfect, as they say, is the enemy of good.