DC - you haven't thought this through.

Look -you're there visiting the retirement home and theres two old folksingers. One is wearing the new slippers his daughter brought him, and he says I never sang songs I didn't agree with, I always played a straight bat and my gigs were all good clean fun, and I'm proud of that. One time the Arts Council organised a tour of church halls and we really lit the room up singing The Mole Catcher. Oh my gosh! the vicar did have a red face!

Next to him in this dirty old bugger who has bribed someone to bring in today's whisky half an hour ago, and the bottles already three quarters empty, and as he leers at the nurses, he winks a bleary eye and says says, Did I tell you about the time I did a gig for Hitler.....?

Which story are going to listen to?
gaddafi's dead. you've already missed your chance of doing gigs for him and Saddam Hussein. Folksong isn't like God. Its not an abstract that requires belief and there are rules divered from the 1954 sermon on the mount, or whatever.   Its an 'is'. It exists. deal with it as YOU want. That's our privilege.