If their job is to invade my privacy and restrict my liberty then I don't feel obligated to be polite to them. I'm not sure if that makes me a bad person, but I'm certain that the Nazis were all just doing their jobs.
The TSA isn't violating your privacy or liberty. You have the option to not fly, or to charter your own aircraft if you don't want to be subjected to TSA. Your anger is misplaced. Maybe direct it at your representatives, or your fellow voters for doing such a poor job at electing representatives.