"What I said is that a festival mainstage is not the place to expound complex ideas which have such profound personal and political implications."

Why not? There are plenty of performers who make their politics an integral part of their performance - not just their songs but their patter too. Singers like Pete Seeger, Dick Gaughan, Roy Bailey and Leon Rosselson come to mind. Are you saying they shouldn't express their political opinions, or is it just those whose opinions you disagree with?