Hmm. That sounds like it can be frustrating, but I can see how it can happen. For example - what's the point of claiming "white people didn't invent slavery?" I can't think of any reason that doesn't involve a blanket statement about either white people or some other race, which would be prejudgement/prejudice by definition. Hence, smacks of racism. Similar for statistical differences in social groups - dangerous territory as it is what "rational racists" try to do all the time. I use those statistics all the time though to demonstrate that it's impossible to prove that a group of people have a certain average IQ or some other grab bag trait because of race, due to noise from other variables like socioeconomic status, local culture, local healthcare availability, local government policy, etc.