prejudiced

biased, preconceived, prepossessed, directed against, influenced, inclined, leaning, conditioned, presupposing, predisposed, dogmatic, doctrinaire, pedantic, opinionated, partisan, extreme, intransigent, hidebound, narrow, intolerant, bigoted, canting, illiberal, racist, sexist, xenophobic, blind, partial, narrow-minded, wedded to an opinion, insular, parochial, provincial, one-sided, not seeing an inch beyond one's nose, squint-eyed, intolerant of, disliking, having a predilection, closed against, judging on slight knowledge, smug.

Antonyms generous*, open-minded*, receptive.