Liberal Christianity is paying for its sinsOut-of-the-mainstream beliefs about gay marriage and supposedly sexist doctrines are gutting old-line faiths.By Charlotte Allen, CHARLOTTE ALLEN is Catholicism editor for Beliefnet and the author of "The Human Christ: The Search for the Historical Jesus." July 9, 2006The accelerating fragmentation of the strife-torn Episcopal Church USA, in which several parishes and even a few dioceses are opting out of the church, isn't simply about gay bishops, the blessing of same-sex unions or the election of a woman as presiding bishop. It also is about the meltdown of liberal Christianity. Embraced by the leadership of...