I don't understand why Vin shouldn't be permitted to occasionally sing a song that some people in the audience may not agree with. He has a sincere religious belief that is important to him and expresses it with conviction and compassion (for all parties).

Things would be pretty dull if we could only hear lyrics expressing sentiments with which we were in 100% agreement. Apparently, it is fine for prominent singers to perform campaigning or social issue songs provided they don't rattle any folky cages. That seems rather cosy. (And here was I thinking that protest song was a fairly impotent genre.)