I think we have really exaggerated this to an unhealthy degree though. Yes these things exist. I've encountered them in various ways directly. But there is also a tendency now for people to see offense EVERYWHERE and in EVERYTHING, even where it isn't intended. And we rarely take the time to truly look at something and go over whether it is genuinely a problem (the instant it gets labeled a problem it is toxic and if you don't agree its toxic, you are toxic). I don't think you can live life by saying if someone from a particular group takes issue that automatically means what they are saying is there, is there. You still have a responsibility to use your own reason and judgment, and people can still overreact (whether they belong to a minority group or not). Peronally I think this is a somewhat infantilizing way to deal with people.
Well, I hope this has some relevance to the thread topic... What I observed is that my wife was subjected to prejudice pretty much constantly. She could recount on a daily basis the insulting and just plain stupid things that people said to her. They showed profound disrespect, ignorance, and often ill-will. This is really and truly pervasive, and comes from your boss, your co-workers, your customers, etc. as the DEFAULT way they operate. Sure, they are 'unaware' of it, but it is still crushing your life, removing opportunities for you to gain advancement, enjoyment, and live in a dignified way. You cannot not fight it, unless you simply want to give up, and even that isn't really a viable pathway.
I know it sucks to be constantly told that your opinions, attitudes, and the entire thought structure erected by your culture is deeply racist etc. Isn't that pretty much analogous to '4e is like a videogame'? I mean, both could be facts, could they not? Certainly seen from a certain perspective they can both ring true. If its OK to have the later opinion, why is the former one so bad? Because it implicates us in being part of, and indirectly supporting, a racist and culturally imperialistic order? I stand guilty! I can still remember my father explaining this to me when he said "I am prejudiced, I am more comfortable around white people." He was a very fair and open minded guy and actively supported minorities when he could, and he could see this truth. Sadly, we find ourselves in a world where our duty as enlightened human beings is to change ourselves, not to get frustrated because people often point out why we need to do that.
OTOH I'm definitely sympathetic. It can be exhausting to confront this in every element of life on a constant basis. Neither you nor I are interested in being offensive or living embodiments of things we don't find acceptable ourselves. It sucks for us too, but it sucks a lot less than being on the receiving end...