It was a massively idiotic move that either campaign could have avoided with a stupid level of ease, and they chose not to.
I think you're vastly overestimating the level of humanity of the average American voter.
More Americans support Israel in the "war" than support Palestine. The same messaging that convinced them that Trump was better on the economy could easily have convinced them that Harris was in bed with "terrorists," if she started coming out swinging to stop the genocide, and betrayed our good partner Israel. She probably would have lost the election even harder.
If the election was held on Lemmy? Sure, it would have been a winning move. Everyone Lemmy knows it's a genocide. That's not what the American people think. It would have gotten her a tiny handful of votes from activists and lost her a ton of support from the idiots.
If you think she should have done it anyway, I get that. If you want the Democrats to ditch this whole consultant-operated messaging machine and adopt Bernie Sanders's authenticity instead, which probably would start winning them elections, I definitely get that. Like I said in a different comment, the problems go about a thousand miles deeper than "more town halls." On that I think we can agree. But this whole fantasy-world where the election was hers for the taking if she'd only taken the side of the Palestinians is pure fantasy. Most people thought Trump would be better on the economy, and that's why he won. The messaging which relentlessly connected Harris directly to the genocide in Gaza is only what they deploy against you, because it'll resonate better with you than stuff about the price of eggs and how Biden caused inflation.