They are very good at what they do. They are intensively trained to do that job and have little idea of anything else. They are trained to believe in themselves and their team - so they tend to be a touch arrogant. They live and work in a pretty closed environment so their ideas of the world seem to be somewhat 'filtered'.
Detlete arrogant - insert confident. Delete filtered - insert focused
When they interact with GA all that tends to come through - add to that the general incompetence that often seems to accompany the armed services and it can be quite amusing.
General incompetence? All fast jet pilots are GA pilots, are all GA pilots fast jet capable?
We had a liason visit from the local top brass after over a years worth of complaining about them busting through our circuit. As they were leaving - after promising it would never happen again - a flight of Hawks (4 aircraft) flew up the runway at about 300 feet. If seems as they get older they learn how to be embarassed!
GA pilots infringe CTR's and level bust into the TMA on a daily basis but never promise it will never happen again.
Generally I believe that both parties understand that the other has different requirments; sharing the airspace taking into account each others needs.