After December 1941 (if not before) it was a good thing to kill Nazis. If it was December 1941 again, it would be good to kill Nazis again. Picketing and petitions would not have stopped the Holocaust at that point (if they ever would have). Any take on evil that doesn’t deal with the Holocaust, and real ways to end it, is bunk.
Killing Nazi zombies, however, is another matter entirely.