Well, the problem is that all the sjws and snowflakes I have meet are too peace loving and compassionate to be able to kill. So I start them off slow by having them play a game of Wolfenstein. Either of the new ones will be really useful. Then I give them a long talking to about how not only were the Nazis incredibly evil, but incredibly stupid. The kind of idiot that would ask "what if the sea is rising because rocks roll downhill into the ocean?" From there it depends on the individual. Some people like swords, others are more of the poison persuasion. A showing of Inglorious Basterds or two and they finally realize there is no compromise with the Nazi. No argument, no half way.

It takes a while, but I like to think they are better people by the end of all that.