I just think if you watch the interview with Demaryius Thomas after the game it's a totally different vibe. Sure, Sherman is not the whole Seahawks, but dude, come on. You sound like an ass, even if you ARE the best cornerback in the league. I may be biased but in this case I really don't think that comes into play. I personally don't think "doing what you're paid to be doing" is an excuse to be a rude twat, frankly. Lots of other players in every team (including Seahawks) manage to be as talented as Sherman and not open their trap and offend another player.
And yes I'd feel the same if any Broncos player acted that way...I just don't like rudeness, even if it's "normal" in the football culture.