Is it any wonder? 

http://www.amren.com/news/2015/07/new-doj-statistics-on-race-and-violent-crime/

This table can be used for a number of interesting calculations. First, we find that during the 2012/2013 period, blacks committed an average of 560,600 violent crimes against whites, whereas whites committed only 99,403 such crimes against blacks. This means blacks were the attackers in 84.9 percent of the violent crimes involving blacks and whites. This figure is consistent with reports from 2008, the last year DOJ released similar statistics. Perhaps not coincidentally, that was the year Mr. Obama was elected president.

Interestingly, we find that violent interracial crime involving blacks and Hispanics occurs in almost exactly the same proportions as black/white crime: Blacks are the attackers 82.5 percent of the time, while Hispanics are attackers only 17.5 percent of the time.