College is full of people who express outwardly that they accept the new, the different, and all but inwardly are not.
This is less a problem in a professional environment ad I've come to learn. I went to a community college and failed all four of my courses and decided that I wasn't going to keep paying for my inadequacy. One semester in then out. A couple years later I landed a job as a contractor for the department of the air force. Everyone except three persons in the squadron I'm working at are civilian contractors. I'm the kid in the cube farm save for one other fella whos got four years on me.
I've never had the ugly encounters like the few I experienced while I was at college and I think it's really just the people man. College is practically an extension of high school for maybe 60% of these jokers. Peaked in HS or something.
Don't let it get the better of you. Poor quality individuals can be a drag but don't give them free real-estate in your head.