These comments are symptoms of greater societal issues. Every one of us is in a minority group, whether it's your race, religion, etc. Every group gets comments like this. But as the past has proven, it's not impossible to advance despite that. Sometimes the best thing you can do about people who act like shitheads is to let them be shitheads, and ignore what they have to say (because it's worthless anyway). Talk about the issues behind what the shitheads are saying, instead of the shitheads themselves.