These people simply dont see Biden as a sponsor of genocide. There's no point in arguing with someone over whether or not to vote for Biden if you both can't agree on that fact.
Biden does not need ro be doing a genocide, it isn't propping up support for him.
If they didn't want to do a genocide they could stop and increase support.
If they wanted to increase support they could stop doing a genocide.
But they don't, because continuing rhe genocide is, obviously from observable reality, more impirtant to them than easily beating those fascists they want you to he so concerned about.
If Biden announced today he was stopping aid to Isreal he'd win the election by 20 points.
But instead he won't and they'll just spend more time and energy blaming us.