A lot of the time you just get into an argument over semantics. Does someones behaviour meet the definition of the word "racism"? People just have more or less extreme defintions. Really it shouldn't matter.

I tend to agree that prejudice is part of the human condition. The response to that should be humility, but also an attempt to counteract that prejudice in ourselves. In an ideal world we would be able to call out racism without it being a taboo. It shouldn't neccessarily mean that the person is bad, but that they may be wrong.