Just a theory, but nothing either more or less plausible than any other speculative nonsense that dominates American politics in this day and age.
A couple of things. Glenn appears to have made a sincere conversion to devout Christian. Also he recently had a diagnosis that he could go blind within the next year.
I believe that he is able to tap into the growing disatisfaction that people have with an ever expanding government by giving some perspective to why many of us feel the way we do.
I find it refreshing that he can freely and openly express his faith. When you look at the hundreds of thousands who went to D.C. he does appear to be connecting with an awful lot of people. I think that is a good thing.