He's not racist, just stupid. Watching the video, it's obvious that he's not comfortable enough or quick enough to be doing unscripted material. He got mad, and like so many other people, he just did the easy attack, which was racial. How many of us have said something stupid when we were upset? When I was 5 I told my step-grandfather to go suck a toad. Had I been older and known worse words I might have said it.
The ONLY reason these guys are suing is because they are taking advantage of the situation. The only money they should possibly get is a ticket refund. Everything else they brought on themselves.