By splunch:
I always thought that being Liberal was associated directly with critical thinking, that it really is almost the same thing. Free thinking. It is not associated with an -ism or a set of beliefs. Dogma of any flavor is, by definition, anti-Liberal. Unless, of course, the dogma is that reason can serve us and we should use it.
I know that's a radical proposition for some folks, quite honestly. It turns out even that is its own brand of dogma. I guess that's the dogma for me.