As much as I may dislike someone, they are still due the respect of a civilized name or descriptor. You'll note that I don't (intentionally) mutilate names and some of the more common practices of pigeon holing.
And just to be me, I might add there is a difference between saying someone is 'acting like a X' and they 'are a X'.
"I believe there are more instances of the abridgement of freedom of the people by gradual and silent encroachments by those in power than by violent and sudden usurpations." -- James Madison