Ever hear of George Zimmerman, the white hispanic guy who shot Trayvon Martin? That didn't get talked about at all, right? Totally no shoehorning of race into that at all, right?
But you are right about one thing, white people do murder each other all the time, and they do it about as much as black people murder black people despite there being 5 times as many white people in the US than there are black people. In case you never took statistics, that means that despite the raw number of murders within each racial group being roughly the same, black people murder black people at about 5 times the rate that white people murder white people, but that must not be concerning or in need of attention at all, right?