Orthodoxy is the state or quality of being orthodox; orthodox means "adhering to the accepted or traditional and established faith," as thefreedictionary.com defines it.
So why am I afraid of orthodoxy?
Because it's a division. Orthodoxy in itself is fine, I suppose; the quality of adherence to what is proper to believe is hard to dislike.
But orthodoxy is used as a club, and I don't like it.