Having thought about it some more: my point is that I agree with the OP that the comment about skin colour is irrelevant to this discussion but I disagree about why. I read the OP as saying that "white privilege", discrimination based on skin colour, and related issues are relevant in North America and Canada but not relevant in Europe; therefore, not only is the issue irrelevant but bringing it up in this context is an instance of the very privilege that was being criticised in the original discussion. I hope noracharles will correct me if I'm wrong in that summary of her point.

My concern is that I don't think "white privilege", skin colour and related issues are irrelevant in Europe. However, that kind of racism isn't the same kind of racism as the prejudice faced by Slavic people and Eastern European people; therefore it's irrelevant to the original discussion in the same way that a discussion of sexism is irrelevant to a discussion about racism. Not because it doesn't exist but because it's not what the conversation is about. But I object to the premise that skin colour doesn't matter in Europe, anywhere in Europe. It really does.