There are plenty of asian men in programming, so this isn't a race thing. It probably is socioeconomic for the reasons the article points out, so that's fine - I think we can leave it at "white and asian people dominate programming because they tend to come from wealthier families".
I think the much harder question is why women aren't in programming. They make up 50% of the population and come from the same exact socioeconomic background as men. This question is important because the repercussions still haunt us today. The article starts this question with "girls weren’t interested in computers or video games at all", and then circles the logic with "people tend to do things that they see other people who are 'like them' doing". Well, I'd like to know why women weren't interested in programming. In my circumstantial experience it wasn't a conscious decision or peer pressure, it was coming top down from society. I saw many parents encouraging their sons to play with computers and completely ignoring that their daughters may want to also. The article completely avoids this topic, sadly.
edit: downvoted within 30 seconds - if you're gonna downvote, please at least reply and start a discussion about it.