Willful blindness to your own douche-bag status is a necessary condition precedent to douchedom. And the key indicator is an overwhelming desire to point a douche-accusing finger at everyone else. Because, yeah. OF COURSE you happen to be the only non-douche in a group composed, so you say, solely of douches. We can tell because you're the one complaining about the popped collars.
A leading symptom of this particular brand of douche, which I've really only seen in D.C. is the self-righteous demand, "Justify yourself to me as a non-douche." A prime example of which was left in the comments today, " How diverse was the high school you attended back home in the midwest? How would your parents feel if you were to bring the son of a Pakistani cab driver back home with you for Thanksgiving?"
Here we have the elements of:
1) A douche who believes he can define douchery based on criteria which rules out everyone except himself and others from the same background/belief system.
2) An attitude of entitlement, "You OWE me justification for your existence."
And 3) The dizzying logic of self-hate in, "I will mock you for any perceived lack of status you might assign me by assigning you a lack of status because you have the potential to assign a hypothetical lack of status to me... "(Although I highly doubt the commenter is, in fact, the son of a Pakistani cab driver. He sounds more like someone who grew up with tales of a legitimately poor forbear's street smarts, and thinks that qualifies him as a self-made man despite his own lack of college debt).
So there, in two sentences of query, we have the magic of D.C. social forces at work. "It's not me, it's you." Because, "You're not like me." And this is proved by the implied argument, "I'm better because I'm the one telling you that you suck."
Gotta love this town.