@wandeljw,
Either you're naive or just focusing on one religion. Just recently, gay marriage bills have failed in many states because of the pulpit. Abortion, the day after pill, euthanasia, hell go back to prohibition, even slavery, all have been topics pontificated from the alter, by many religious leaders, some more noticeably than other. Religion is part and parcel of the american political history. I'd venture many, many countries have had the same interference.