Speaking as a devout atheist - and a committed folkie.

Hey - if the music is good - go for it. Why should the devil (whoever she is) have all the best tunes. I even wrote a gospel song, though how I sing it with my toungue firmly in my cheek I will never know.

I also sing "Bunch of Thyme" on occasions - but I do draw the line at the wearing of the kilt.