Another MP is (anag) — one who dislikes people in general (11)
I believe the answer is:
misanthrope
(Other definitions for misanthrope that I've seen before include "He hates everyone" , "Moliere character" , "Hater of humankind" , "Person who dislikes people" , "Definitely not a "people" person! - shipmate Ron (anag)" .)