Why does White on Black crime get more attention than Black on White Crime?

First, let me say this; I do not advocate what happened in this video to come.  Any sort of hate crime is awful and the guys who did this, ought to be sentenced to death.

The Video: (Via CNN)

Yes that above is horrible and the media rightly is bringing it to attention, But, when blacks attack whites or when Muslims shoot up a Military base; nothing it said by media outlets, nothing is said. I just do not understand it.

What I want to know is; how do they know this person was involved? That video was grainy. I did not see any definite proof that this man even did it! Not only that; how do we know this man did not provoke the attack? How can we trust the credibility of the witnesses; are they black too? Can we trust them?  I’m sure there are answers for all that; but the report did not include those answers.

Again, I do not justify this madness; I simply am pointing out the double standard. I guess you could say that I have “a dog in the fight.”

Again, let me state this; both crimes, the one above in the video and the one I linked; which is to previous posting of mine — are equally wrong, evil, immoral and should be punished as such. I just do not understand why the liberal media does not treat them equally. They should, but they do not.