Dear Grishka
Many thanks fot your detailed reply to my comments. I appreciate your interest in my point of view.

First of all, I've got to admit as a songwriter for just over 50 years I would have loved to have written Hitler -he's only got one ball. In a way a song like that renders criticism of Hitler superfluous. It doesn't need to say 'your ambitions for a thousand year reich are absurd, your cruelty and ignorance is repulsive, and you have failed on every level as a human being.' THe juxtaposition of the Nazi grandiosity with the abusive doggerel that expresses our contempt - its part of the songwriters magic.
Yes the holocaust deniers always want proof along with Hitler's e-mail proving that he didn't get on with Jews. But that's how it is when you write songs - you publish and that's it. You've lost control. People will make whatever they need out of your song.
Alan