Besides the Baptist part, I was wondering why they kept referring to him as "the preacher". Is he a preacher? or is this just the usual BBC anti Christian slant?
I've seen "preacher" used in other sources, so it's not just the BBC. Anyone can call himself a preacher, and in many denominations, anyone can preach who's invited by the congregation or the pastor. I don't know whether Mr. Killen is an ordained minister of any kind, or has seminary education.
For the record, I'm glad he's going to jail, whatever his religion is :-).