According to Merriam-Webster[1], racism is defined as one of the following:
1. a belief that race is the primary determinant of human traits and capacities and that racial differences produce an inherent superiority of a particular race
2.a. a doctrine or political program based on the assumption of racism and designed to execute its principles
2.b. a political or social system founded on racism
3. racial prejudice or discrimination
As far as your comment you are simply "protecting oneself from populations with, on average, markedly higher violent crime rates than other populations," if that population is defined by race, you are being racist unless there is some newly published study I have yet to hear about that "blacks love crime."