I too am often bothered by the racism I hear in frum circles. However I think that a distinction needs to be drawn between generalizing about a group (be it racial, cultural, national, political etc.) and judging an individual based on that generalization.
Every individual is a tzelem elokim and can make free moral choices. It is true however that there are generalization that can be made about groups. The key is not to judge the individual before you based on some characteristic that known about his group in general.