What this DUmb**** doesn't realize is that (since he said "Mass," I'm assuming Catholic) the Roman Catholic Church has a stand against gay marriage. One school of thought says that if they don't say "political" things from the pulpit, then the priests themselves are culpable for the sins of their flocks (where it concerns those views), before God. The thought there is that they didn't warn against it, and to be a proper "shepherd" of their "flocks," they have to keep the congregation informed of the threats to their eternal souls.
It would be very difficult to prove the DUmb****'s point in court.