LogFAQs > #965305536

Because it's less about WH40k fans being bigoted, as much as certain online communities that tend towards bigotry *cough*4chan*cough* also tend to unironically love the xenophobic aspects of the game. So the bigots express their bigotry in terms of burning the heretics or praising the Emperor.

Though if that's your problem with the game you might not have to worry about it any longer, because Games Workshop has been talking about social justice sterilizing their game for a while now. Because in the grimdark future where there is only war, it's also super-important for everyone to be tolerant of everyone else's cultures.