Myself and one other player (the dm's girlfriend) deliberately got ourselves captured by an evil empire to infiltrate and liberate a concentration camp. What we knew before getting ourselves captured was that they have been taking away anyone without their "papers" and people of certain races, including the other player's race. When we got there all of the prison guards were really nice and the prisoners were totally fine. One of them legitimately said that it was good to be away from the bigotry outside of the concentration camp. At this point we stopped the session, yelled at the dm and got him to agree to rewrite this section. I dont know how anyone could possibly think this was ok.