Yes, we are. That study Kapor refers to is actually really good, groundbreaking science. You should probably read it.
Just because you're a racist doesn't make you a Bad Person (since we're all racists and we can't ALL be Bad), it means you need to come to terms with it and look more critically as your decisions that might have been influenced by our society to discriminate unfairly.
I'm sorry to be rude, but this article was written by someone who not only won't take responsibility for making potentially racist comments, but won't even reconsider whether the comments are racist or not.
Also, from the way he writes about it, I highly doubt Arrington has been exposed to the great colonial (racist) history of "Entrepreneurship".