The difference is the others are hating on a technology, not a person. You are insulting a person. He didn't insult javascript developers or people who like it

The difference is the others are hating on a technology, not a person. You are insulting a person. He didn't insult javascript developers or people who like it he simply said he doesn't like it, which for some reason got you personally insulted. Hate is a word used in the modern world pejoratively to mean strongly dislike especially I've noticed those with English as a second language.