Same reason most of us don't.
There is tons of outrage. But, it doesn't become a national issue for two main reasons:
1. As others have said repeatedly, there were arrests and the path to justice has begun in that case.
2. The racist acts of the perps in that case are not supported by institutional racism, especially a hundreds year old history of institutional racism.
Yeah, he's made some comments I disagree with. His comments 20 years ago during the Crown Heights riots were racist, to me, even though he tried to justify them for years as being out of context. But he didn't start those riots. He just did nothing to quell them and instead marched and chanted "no justice, no peace," in the middle of them, when he should have, as a minister and activist, called for peace.
But that was 20 years ago and he has apologized and changed since then:
http://www.jta.org/news/article/201...s-he-made-mistakes-during-crown-heights-riots
And that was the only instance wherein he could be connected to violent protests. In this case, he is doing the opposite of making inciting comments, IMO. He's asking that people conduct themselves in a dignified manner.
Yes, white people are the only group in our country that haven't had to fight for their civil rights to begin with.