I wonder whether in some cases it's even about Palestine. Or whether it's in search of being "against the system" and "against the political ruling class".
This is what I'm trying to say, essentially. For these particular folks, I think this is becoming a bigger reason. It's not about Palestine anymore, it's just giving people a reason to be "against" something and protest something.
This generally seems to be a trend in Western societies. In some ways, these or the "no weapons for Ukraine" is the same chanting crowd that vigorously opposed all Covid restrictions and spread utter nonsense about how evil the vaccines are. I guess even if the governments came with the development of an universal cancer curing therapy, they would find a way to oppose it. And/or claim it was invented by Bill Gates or the Rothschilds to enrich themselves.