The Private Security guys varied. Some were the bearded, calloused caricatures popularized by Academi (nee Xe (nee Blackwater)). Most, however, were professional, with varying degrees of collegiality. I worked with a team of Brits who were warm, funny, and fastidiously professional - they took me on dozens of runs through Baghdad, and I always felt safe (or as safe as I could feel) with them.
The Americans I worked with were equally professional, though quite cold and distant. Too many reveled in the bearded machismo of the gig, which annoyed me, but whatever. The State Department's Regional Security Officers (Federal agents dedicated to protecting diplomats) were top-notch - always easy and pleasant to work with.
TL, DR: Some were jerks, most weren't.
@Captain - I wanted to like Spec Ops so bad. In the end, it felt like a poor compromise between its artistic ambitions and the commercial demands placed on any mil shooter, these days. I definitely felt regret and shock - specifically, during the WP episode, which I thought was perfect, actually.
As for the linguistic queries, you make my English Major heart smile.
Thanks for the feedback!