I get that progressives can be dogmatic in a general sense, but we are not talking in general... we are talking about how Scritpture and tradition inform our faith, and whether or not it is prudent to take a literal, legalistic approach to one's expression of faith.

I personally don't see how a rigid traditionalist--so focused on fulfilling the letter of the law--can possibly uphold the spirit of the law. For the most part, I think it is fair to say that progressives place more emphasis on the spirit of the law, in accord with the Lord's admonishment to worship Him "in spirit and truth."  He also warned about being overly scrupulous, which I believe many ultra-trads fall victim to.