What's the big deal about "The Devil Went Up to Boston?"

I just heard a DJ on WUMB mention that they would not be playing this song on the station, and if you watch the video you would know why. Not only can I not watch the video, I can't find the video online, as it seems to have been thoroughly removed from the usual channels.

So, having missed this kerfuffle, can someone tell me what was so offensive about it? I haven't been this curious about the state of Boston censorship since The Globe censored the Doonesbury cartoon because B.D.'s response to finding out he had lost a leg was "Son of a bitch!".