Wait, you're comparing a personal view/trolling to legitimate crimes against other people? Also, you can be as racist and homophobic as you want in real life, since it's freedom of speech. Your argument literally has no logical backing. Do you really think nobody says racist or homophobic things in real life? What you're asking for is censorship. Your only argument is that you don't want people with a different view to voice their opinion.
I think the point here is voicing an opinion that is irrelevant to the topic.
Why should people (insert: derogatory religious, sexual and racist comments here) on a video about funny cats?
On a video about funny cats people should discuss funny cats. Because the video is about funny cats. That's the purpose of the video. It's why it exists. FUNNY CATS.
You say there's freedom of speech in real life, but along with it there's also the possibility of getting the life beat out of you.
That tends to put somewhat of a limit on how far people will go. And you're certainly not just going to randomly come out and have a go at someone for no reason.