[foobarbazqux]

It's not about saying things that might upset some group. It's about saying things in a public forum that are deliberately upsetting and abusive and promoting hatred. You don't have to worry about it because you know exactly what you are doing when you do it. It's like worrying about getting a ticket because you accidentally drove in reverse down a one way street. And if you look the vast majority of cases get dismissed.

Also consider that American corporations wield an immense power to restrict speech, and they are quite liberal about doing so.