That’s just self-indugent tribalist scapegoating using an argument which is circular and self-disproving.

• If there were too few people who cared about the Israeli Genocide enough for it to affect the vote, which is would justify the decision of the Democrat leadership to not do anything meaningful to agree with the demands of those voters (Biden pausing his own decision of sending 2000lb bombs is very much a “I’m saving you from myself” moment), then you can’t really blame those few people for the Democrat loss since there were not enought of them to make a difference and something else made the Democracts lose, so the fault is in the strategy followed by the Democrat leadership on other subjects.
• If on the other hand there were so many people who cared about the Israeli Genocide enough for it to result in the Democrats losing the vote, why did the Democrat candidates not go after that vote? Again, the blame is down to the choices of the Democrat leadership: it’s always easier to change what a handfull of people do than to change what millions do, so for the handful of people in the Democrat Party leadership to change their position with regards to supporting Israeli in its Genocide would be far more logical to expect in that scenario than for such a large slice of the electorate - millions of voters - to change their position instead. Even if one thinks “our leader’s position is more important than that of millions of people so it’s the millions who have to change their positions, not our leader” (a bootlicker’s mindset, BTW), it’s still incredibly stupid to go with “we’re going to convince millions to change their position rather than just that one guy” as a strategy so the blame still rests with those who chose to go with it.

All I see here and now is people making a pseudo-“argument” that is entirelly reliant on the axiom that “the boss is always right” to manage to somehow blame millions for something which the “the boss” could have (per the part of that very same pseudo-“argument” which claims it was the people who were against the Israeli Genocide that sawyed the vote) easilly avoided by just meaningufully changing his position on just that one subject. That presumption that the leaders are blameless and it’s the peons who are to blame for not being willing to follow the leaders no mater what they were doing, is a 100% subservient mindset.

If you’re going to assign blame for Trump, look at the handful of people in the Democrat Party who chose to do things in such a way that the results was that millions of their own electorate chose not to vote for them, thus delivering the election to Trump.