People fundamentally view voting through different lenses. Most people view voting as simply a lesser of two evils choice. Some however view voting as more of a personal endorsement. And they will choose to simply not vote for either candidate, or any candidate at all, rather than voting for any candidate they consider to be irredeemable.

You're not going to shame or convince people out of this. Any shaming based on the relative positions of the two candidates is pointless. Realize what you are going up against. You are going up against some of the most fundamental ethical frameworks human beings have for looking at the world. You are going up against thousands of years of human ethical reasoning.

When you start talking about how Kamala would have been objectively better for the Palestinians, you are arguing based on utilitarian ethics, the maximum good for the maximum number. You are saying, "yes, I know Kamala will abet a slow genocide, but I think Trump would abet a fast genocide. Therefore, Trump is better." When someone chooses to vote for neither Kamala nor Trump, they are voting based on a respect for persons ethical framework.

From a certain perspective, simply getting involved and endorsing anyone with the views on Palestine that either Trump or Harris have impugns you morally. This is literally the entire reason the Trolley Problem was created. One of the core perspectives from the beginning of that was that flipping the lever at all is morally wrong. It is wrong to kill someone even to save someone else.

Again, you can shout from the rooftops about how good Kamala or Trump would be for Palestine til you are blue in the face, but ultimately not everyone thinks on utilitarian grounds. And it wouldn't be such a classic discussion in philosophy if utilitarianism was the universally agreed on best moral framework. Utilitarianism's Achilles heel has always been that it can be used to excuse some pretty horrible things. Hell, even genocide itself is usually justified on utilitarian grounds.

I do not find it all surprising that many would vote for Democrats downballot and then simply not vote for anyone for president. It makes perfect sense from ethical perspectives that people have been debating since before ancient Athens. Shaming people based on utilitarian arguments is counterproductive for people who view their vote as an endorsement, not as simply a choice of which candidate is better than the other.

And I can't say they're wrong. I voted for Kamala. If she had won, she likely wouldn't have changed anything in terms of Biden's Middle East policy. And you know what? I would have had to go to sleep each night knowing that I helped put her in the seat that she was currently using to abet a genocide. Yes, I would know in some part of my mind that Trump would have been worse. But that would be cold comfort. I can absolutely see why millions of people would decide, "I refuse to accept responsibility for either of you. A pox on both your houses. YOU, not me, are morally responsible for any of your sins, but I refuse to get involved. Do what you want, but I'm not voting for either of you. I hope you all burn in Hell."