I don't like most police either, but that doesn't make me a criminal. It's a matter of disliking people with bad manners. Scheduling important office hours and taking a break in the middle is bad manners. Not returning smiles is bad manners. Believe it or not, living in a world with pleasant friendly people is actually nicer than having an NYU MBA, or a high paying job. So when I see people trying to justify their unpleasantness I don't like it.