"but it does make me feel uncomfortable"

I find it irritating. We put on concerts too and two instances come to mind where well known (here in the UK)artists did insist on preaching to the audience. The problem with doing that to a small audience is you get someone who disagrees with the performer and what should be entertainment turns into a politicl debate. I kind of resented paying good money to see two guys argue with each other and wouldn't fancy paying good money to have someone preach to me either. I've no gripe with songs having messages etc but they should mostly speak for themselves perhaps just with a short introduction rather than a big monologue.