Yes they can. I am white/black and got it from both races in high school and even college. The whites would call me "half breed" and the blacks would call me "oreo" and neither group would have anything to do with me like I was some kind of disease.
I think your perspective was a good one to contribute to this thread. The way you took heat from both "sides" illustrates something else...that unfortunately, prejudice is a universal human characteristic. I think that the more parents, or potential parents, that recognize that truth and raise their kids with that understanding, the better off we will be.