I think that article is a bit too biased to draw any conclusions from, but there are repeated instances of white people attacking black people and not being charged with hate crimes. In fact, when you look at the total crimes committed in the US, very few of them amount to hate crimes, by legal standards at least, and only half of them relate to race at all.
The way hate crimes are classified vary by state, and it's incredibly inconsistent. For example, there were 26 auto thefts classified as hate crimes in 2008 [
1]. In some states, you cannot be convicted for a hate crime for theft, but only things like assault/murder/battery. How you determine one stole a car because of hatred seems odd to me, but that's the problem.