I will never forget something some black football buddies I had in high school said to a couple of us white dudes. We hung out a lot, went to movies together, hung out with chicks together. But this just came out of the blue one day. They asked us if - when they weren't around us - if we used racist language, like the n-word. There was a palpable sense that they thought it was possible we were not completely on the up and up with them. That we may have acted like their white buddies, but when they were out of ear shot if we were behaving in a way that didn't comport with supposedly being their buddies.
Now, my mama trained me to never use the n-word. But you know what? Those black dudes had every right to wonder about the depth of our bonds, our friendship. Because, guess what? Yep, I did hear some of my white football buddies using racist language and being prejudiced. Obviously, my white buddies lied, and assured my black buddies that everything was on the up and up. I remember it to this day, because not only was it a lie, but it was a betrayal and a disrespect to our black buddies on the football team. I also felt disrespect for myself for not having the strength to shame my white buddies, or at least trying have an honest dialog about it.
And you know what it reminds me of? It reminds me of all the rightwingers on jpp.com who, from the safety of an anonymous keyboard, find the courage to bellow racists crap....but undoubtedly around their co-workers and neighbors they keep the racists part of them under wraps, incognito.
Now, over the years I have dated a few black women, and really the friendship was exactly the same as with a white woman. So real and genuine friendship is easily within reach, as long as all human interactions are conducted with mutual respect, courtesy, and honesty. So, the article from the OP is a tad cynical for my taste. Just my two cents.