them protesting the DNC is not going to increase his chances of winning.

That is planely false. This election is likely to be a very close one, dictate by a handful of votes in a few key swing states. Because that's how it pretty much always is, especially in these last few elections. Even if these protest change only a small amount of votes, it will have a massive effect on the chances.

Also, imagine thinking that Palestinian protestors are doing it to feel superior.

That may not be the explicit goal. However the never Harris crowd is putting women, the LGBT, the environment, the poor, and other people at risk because their own comfort is more important to them. Yes, Harris is fucking terrible. But the deaths of Palestinians will be worse under Trump, and will also lead to the deaths of more people over all. It is a trolly problem that they're willing to let more people die on, because they want to feel superior than those who are willing to pull the lever to save lives.