Pilots are human beings, and therefore will behave in this way too (it would be statistically remarkable if they didn't) - they will also exhibit a full range of other human behaviors, including, of course, all of the positive ones. Since FA's, Engineers, passengers and indeed everybody is also human, the same is true all round. You can find good and bad everywhere you look - attempting to draw any kind of conclusion from what is seen will usually be fruitless.
The overwhelming, massive majority of Flight & Cabin Crew are pleasant, skilled and well intentioned people, anxious to do a good job for their customers. A minority, of variable size, is probably unsuited to the job. The trick, for us, when dealing with passengers, is always to treat as you would wish to be treated yourself, and to remember that most people are pleasantly disposed and will remain so if dealt with courteously and intelligently. The trick for passengers, when dealing with Airline staff, is to do the same.
I think Tightslot has summed it up. We have to be pleasant to security just as pax after being made to walk around in socks and feel like right old plums (mine normally have holes in too when it happens) so it all goes around
