Nowadays, nearly everyone is ashamed of being called orthodox. Even conservatives want to see themselves as heterodox. Among leftists, it goes without saying that orthodoxy -- whatever it is -- is a sin (if not a sin, certainly politically incorrect). In part the fear of being called orthodox is a fear of being common, ordinary, & unoriginal -- a very modern & modernist fear. It's a fear that we should overcome; otherwise, political discussion gets silly. "Party lines" should be rejected only when they are false, not because they are "party lines."
Yoshie