Thanks to those of you who've expressed some sympathy with my point of view.
As to the rest I've read what I should have expected: the implication that I am oversensitively PC; the implication that I have no sense of humour; and attempts (which stretch credulity to breaking point) to reinterpret the song as sympathetic to the gay cause.
I suppose I ought to have realised that when you confront peoples prejudices head on they just get defensive.

Phil