As far as i'm concerned your only racist if you HATE people specifically for their race
Judging people from statistics isnt racism, and being prejudice against certain people due to past experiences isnt racism either. As a kid if you get stung by a wasp you learn, same goes for people. its very human to look for patterns in behavior and 'judge books by their cover', which isnt even a bad thing, people portray how they want to be seen and should be judged by that.
on another note, give individual people chances, if somebody from a race you tend to think negatively of talks to you, dont be rude, treat them as you would any other person. you might find you have alot in common with them, not everyone from a race is the same.
judge people as people not as a race, but dont be ignorant of statistics.