It's just silly.
Nevermind that black people also come from: Jamaica, the Dominican Republic, Thailand, etc.
> Five statistically unlikely people have been shot simultaneously
> Five statistically common people have been shot simultaneously
To say nothing of the killer's explicitly stated racial motives, historical repression, slavery, curtailing of rights, violence, et cetera. :P
See also, "man bites dog".
If the shooting had been in a predominantly non-white society, the headline could well have been what you proposed.
So it's a very uneven treatment.
Also, statistics are unhelpful here. Overall whites are a maj. in the U.S. They may or may not be in the locale where the crime happened, and minorities may or may not be a majority in the place a crime happened. So it very much depends how large you want to make this "place"
But I'm just so pissed, because in my country (Bulgaria) the roma (gypsy) population are always treated (by the media, and unfortunately a lot of people I know) as non-bulgarians, non-citizens, even non-people by some.