Once you really get into a song, other than just listening to it, it forces you to go 'oh, they did this. I never would have thought of doing that,' when you deconstruct it. It's something you really can't do sometimes when you're just listening to a song. You have to really get into it.
I think all Nazis didn't see themselves as bad people. I've never met a racist yet who thought he was a racist. Or an anti-Semite who thought they were anti-Semitic.