Some people have jobs where they are required to be mean to people - cops, administrators, bill collectors. I understand this, I accept this, and I acknowledge that it is sometimes necessary to draw a line in the sand and say, "that's the way it is"...period!
An excruciatingly painful thing happened to my daughter (and thus the whole family) six years ago. I just got off the phone with a very cold and heartless woman who brought every ounce of pain back to the surface. I am a completely innocent party who was just trying to get through my life one day at a time and suddenly I'm faced with having to deal with something that I thought was done six years ago! And sadly, the "human being" on the other end of the phone read the lines of her script beautifully and with just the right mix of loathing and disdain.
Maybe it is the job that has made people mean. Maybe some people are just mean!