Thank you. That helps.
Dogmatic is a word with . . . arrogant . . . connotation.
I know the meaning given in your context, a proper one, and I still choked on it. :-)
dogmatic, in this context, simply means axiomatic, handed down as if from higher authority, not open to challenge or debate.
I'm certain you know this. I am simply clearing up a possible point of confusion.