> most people are simply not psychopaths
This. It's not like Emmanuel Macron and the President of Singapore, who have been critical of Israel's actions here (mostly the former), are weird radical lefties, for example. They just recognize the killing of Palestinian civilians for what it is: revenge and retaliation, and a deliberate violation of the kinds of human rights that don't really "exist" unless countries make some attempt at respecting them.
Most people, if being honest, and if the victims weren't Palestinian, would recognize that a military action that is basically along the lines of "for every one of our people they killed, we will kill 10 or 20, and won't care if they are old, young, woman, child, and anyone who rejects this is a terrorist sympathizer and wanted our people to be killed", is simply logically and morally unhinged. And if the victims weren't Palestinian and mostly Muslim, and if Hamas wasn't an Islamic extremist organization, people would be less susceptible to the gaslighting about how anyone who is against the killing of Palestinian civilians is "pro-Hamas"