People attending church for social reasons alone goes back a few centuries, political affiliation aside. Enlightenment sentiment substitution for Christian virtue has just made it more spiritual for the socialists.
I think that the same forum that would have a majority of posters opposing ecclesiastical authority in almost any other context, is probably on shaky ground in its demands for denominational sanctions that they wouldn't expect elsewhere.
Instead, this issue is just one of many involving a general lack of character in the candidate. Beyond the lack of character, his positions on every national issue make him a candidate unworthy of anyone's support.