This is bullshit. It would be partly valid if it were just about "information hostility" but its not. People are making choices not just due to ignorance or misinformation, but based actively on spite, hatred and "fuck you got mine". People are deciding not to necessarily better their own situation but to harm others. It is selfish, myopic and yes, utterly fucking stupid.

Normalising this way of behaving means that yes, if you're in the group that benefits from today's decision you're ok, but nothing stops you from being in the out-group tomorrow. And if your goal is inflicting harm, well tomorrow that harm will be inflicted upon you.