I don't see how I am doing that. The poster was reacting to it by saying the content seemed discriminatory. I would concur that it feels weird and a bit racist to say this group can do X in the game and this group can't. I also think by telling people they aren't allowed to imagine being from group X, Y or Z, those people are not going to get as many opportunities to try putting themselves in the shoes of X,Y, or Z. A lot of this probably comes down to assumptions. I have no doubt the writer of that book probably is trying to increase the good in the world, and has a set of assumptions about things like cultural sharing and exchange, and portrayal of in media, and so is working off those assumptions here in the text. I hold different assumptions and think the premise underlying what he is saying is flawed and doesn't lead to better results for people in the real world.