Earlier quoted context omitted.
You can say and think whatever you like. Companies giving platforms to hate is not something that democracy requires. It's less "that idea is popular" and more "these people are inciting hatred against other people". I'm baffled that people still repeat this "free speech is important" thing when we're talking about a private service giving an audience to white supremacists.
hate cannot be precisely defined though. Thats the crux of the argument.
It means "intense dislike". If that is directed at an intrinsic property of a group of people, that's hate speech.
Example: black people as opposed to smokers.