I'd be lying if I said I hadn't had similar thoughts. Thankfully, running into a genuine jerk is uncommon, but each one can ruin your day. I think what bothers me most is the sure knowledge that the offending player is not only entirely unrepentant, but may also be getting a kick out of making the group uncomfortable.
Worse still, there's no surefire way to deal with it. Try to address a nasty or bigoted comment in party chat? You're just giving them the opportunity to troll you further. Kick them? You may not have the votes. (If it's a guild group, you definitely won't.) Stay silent? Drop group? Submit a ticket? Or maybe just hope that the Loot God smites the offender at some point in the near future?