>Dear reader, nobody gives a whit about whether you like ice cream or
not. We care about what works and doesn’t work. Everyone has to agree on
that. What works can be around in some way. What doesn’t work is going
to have to be gotten rid of, no matter who you are or where or when you
live.

If I understand the article correctly, that is what he is saying. The basis of his argument defines evil in some greek root or something.

Thanos is definitely evil. Even if he his vision isn’t evil by your definition(and I’d argue that ending people’s lives against their will is a form of slavery), his journey to amass enough power to achieve his vision was utterly psychopathic. Psychologists consider psychopaths as broken individuals in regards to society, and so they should be considered evil.