Are you sure this a case of 'reverse racism'? Looks to me like they were following guidelines already laid out.
I agree the sentence sucks, ...and I doubt "house arrest" is the appropriate rehabilitative environment for them to begin with. They clearly learned their unacceptable behaviour at home to begin with.
Based on what I read, ..there's no doubt in my mind that was a hate crime. The sentence would have been much different had I been presiding over that one.