Morwen: Alas, I do not know the song I described. I heard it a couple of times some years ago from an Englishman who was at Harvard at the time. All I remember is that the chorus rhymed "music near goes through you" with "glory hallelujah". Good luck.

As to the Horst Wessel song, I would certainly not "perform" it if by that you mean sing it in a group; but I would sing it to an individual who wanted to know what it sounded like. It does, after all, live in infamy. It has even been parodied.