This isn't even particularly preachy, the messaging is utterly confused. It's never made clear exactly why Centaur-Hitler put them in the concentration camp, beyond not acting in the national interest, which is boilerplate fascism but not particularly to do with racism or other discriminatory bigotry. If we assume Centaur-Hitler had the same motives as Human-Hitler, who are the Jews? The homosexuals and academics? Gypsies and Poles? Also, how the fuck do you adapt a Sherman M4 tank for centaur use?