Liberalism has subconscious guiding principles. That is what Ann is trying to point out. Unshakable faith on the part of those who don't believe in faith: the ultimate hypocrisy, in those too dumb to realize it. And Ann hits it spot-on.
Liberalism does at least require faith, I agree, which is a big part of religion. I don't think it's unshakable for everyone though, considering how many of our number here at FR are ex liberals.
IMO, liberals tend to unconcsiously follow multiple principles which are at considerable variance from and opposition to each other. When they become concsious of them, then they have to choose. A surprising number choose to move right - I suppose an even larger number just never wake up.