Totally frank and anecdotal, but I believe computer war sims attract a fairly interesting and diverse crowd... That sometimes overlaps with fascist sympathizers and archaic dynasty worship. Hyper conservative History majors are strange like that sometimes, I mean, these are the same kind that attend gun conventions for WW2 "memorabilia". Years of Civilization mods featuring slave rule and exploitation systems modded in "for the lulz" or "historical accuracy" kind of desensitized me, but then again, a lot of these games are allowing the use of some really heinous shit for the means of entertainment.
I agree with their reasoning of letting it be until the messaging became caustic. I like my virulent racists in the open, exposed, with their names attached to their work.