The same can be said for the military guys transitioning to the civilian world.
It's all in the attitude.
I personally have been told by an ex F-15 type NEW HIRE (who I had just bought a few adult beverages for....), that he felt that civilians had no business at SWA, and proceeded to tell me what's what. I didn't bother to remind him that SWA is a civilian company...... I just laughed, then asked him if the F-15 was one of those green, army plane with 4 propellers

After describing to me the differences between air superiority fighters and targets, I then asked him if they called his plane the "Eagle", and if so, didn't he have to be homosexual to fly it? I thought he was gonna hit me........
In his defense, he had already had a few before I got down there, so he probably wasnt able to contain his attitude. He is still here, 5 years or so later, so I assume that he either kept the attitude in check, or someone handed him his a$$......
In almost 20 years of airline flying, I have flown with pilots of just about every backround. From 250 hour EEOC wonders to 15,000 hour numerous airline guys, to blue angels, thunderbirds, corporate guys, commuter pukes, cargo guys, fighter guys, colonels, astronauts etc etc etc etc.
No one group corners the market on jerks, nor are any devoid of them.........
FWIW, while I'll razz some of the military guys (especially the "retarded kernals"

), some of my favorite guys to fly with (in both seats) have this pedigree, and conversely, some of the biggest jerks I've flown with have been pure civilians.
As a matter of fact, the 4 worst guys that I've ever flown with as an FO were civilians.
Attitude is everything........