Dude, you called the lead article "racist" and "disgusting" because you didn't agree with it and proceeded to explain why your personal experience is at odds with the findings of academia. And you're calling me arrogant?
Fine, I'm arrogant. But here's the nuance to the academic position that you seem to be missing from your assessment of its relative merit:
I've lost count of the number of articles that have pointed out that references to white people being racist only means the person reading the article if the person reading the article is racist. It's tragic the number of people that have a knee-jerk reaction to the merest hint that they might be racist. It has a distinct air of 'methinks the [individual] doth protest too much.'
You may have noticed that I am a white person. I, too, have friends of different ethnicities, political orientations and religious affiliations, that should be normal.
Maybe, just maybe, though, there are psychological predispositions and thus subconscious biases that are at odds with one's own conscious preferences. Indeed, research shows that liberals are so aware of the possibility of their own racism that they are sometimes counter-biased, and are mildly prejudiced in the opposite direction to some degree. See for example (direct link to PDF):
Stereotyping is what our brains do as a first approximation of anyone we meet. You, for example, called me arrogant based on nine words. Yes, we may well consciously counter-bias, or even argue strenuously that we don't have a prejudiced bone in our bodies. However, until such time as we are all raised in an environment that has a roughly equal admixture of all "types" of people (which seems pretty unlikely) we just have to contend with the fact that our brains, thanks to biases, heuristics and other cognitive "tricks", will cause us to make prejudiced assumptions. What differs between us all is the degree to which we recognise this and the degree to which we try to do better.
You say that you have a multi-cultural lifestyle, and I have no reason to doubt you, but that doesn't mean that you don't have to check yourself sometimes because you have thoughts that aren't worthy of you. Indeed, I'm pretty sure we all do... I know I do.