Several specific individuals would have to be removed ... permanently from the forum for that to happen. That would not suffice, as they would sooner or later be replaced by others of like mind.
Some folks are dedicated to promoting their own understanding of the Gospel.
Others are dedicated to trashing understandings of the Gospel with which they disagree.
Since a number of FReepers are dedicated to the Constitution, you are right, it won’t happen. Constitution, Amendments, Article 1, “Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof;... Constitution, Article 6, “...but no religious test shall ever be required as a qualification to any office or public trust under the United States.” While being a FReeper is not an office or public trust, it would seem to be hard to be a Constitution loving FReeper and a supporter of our having a religious King, much less agreeing to same.