Sadly it's not just the rightwing.

I say this as a member of a leftwing party in my own country which could use a little more thinking and building politics up from principles and a lot less blind parroting of what the tribe's chiefs say.

(We also have a Communist Party around here and those are even worse).

There is quite a large overlap between leftwing and the highly educated (maybe even intellectuals) so leftwingers are thinkers rather than flag waving parrots much more often than rightwingers. However, humans being humans, even many of those can get a strong emotional bond with a party, by which point they become unchallenging and unskeptical tribalists.

"Perhaps genocide is bad? Perhaps starving children to death is wrong?"

"Ohoho why do you love Hamas? You think Hamas would accept you? You are a fool. A clown."

The comment of @edgemaster72 just dovetails perfectly with this: "Once again showing how empathy is a completely foreign concept to them"

Only somebody who thinks other people (including LGBT) are unable to feel bad for human suffering other than of the kind that affects or might affect them, would think that's a valid argument.

The whole idea that people might simply be against such extreme human suffering even amongst those one who would not see as friendly, completelly flies over their heads.

I've actually heard that one.