telling other people that their languages are some form of "tribal grunt" is a form of aggression in my book. that kind of verbal aggression usually precedes the actual act of physical aggression because that idea is based usually on a concept of a superiority of some sort.
just like the nazis claimed that they race is superior to others and used that construct as an argument to kill 5 mil of jews, you are claiming that you are leaving in an english dominated world and all non english talkers should suck your dick.
Verbal aggression may often precede physical aggression, but it's not the same thing. Sticks and stones may break your bones but words will never (physically) hurt you. I don't give a shit about your feelings and I have no problem if you don't give a shit about mine. Nobody has a right to not have their feelings hurt.
If you can't make the distinction between genocide and overgeneralizing group characteristics, then you have a problem. There is a major difference in kind and not just in degree.
Nobody has the right to be included in a free association. That would make the association not free, so if I reject people for not speaking English properly, it only makes me a grammar Nazi, not a homicidal National Socialist. You can call me a racist sexist asshole all you want. I only have the right to argue against you or ignore it. I don't have the right to punch you in the nose.
I think English is a superior language and so those who speak it are superior, all things else being equal. You have a right to disagree, but freedom means tolerating people who think differently than you do. Besides, what would we talk about if we agreed on everything? I'm guessing we'd discuss how superior we are to everybody who disagreed with US. Then you would want to FORCE people to agree with us or at least act like they did. We'd be worse than assholes. We'd be bullies. How boring.