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The shooting death of Trayvon Martin in Florida has sparked national outrage, with civil rights leaders from San Francisco to Baltimore leading protests calling for a new investigation and the arrest of the shooter.

But what about all the other young black murder victims? Nationally, nearly half of all murder victims are black. And the overwhelming majority of those black people are killed by other black people. Where is the march for them?

Where is the march against the drug dealers who prey on young black people? Where is the march against bad schools, with their 50% dropout rate for black teenaged boys? Those failed schools are certainly guilty of creating the shameful 40% unemployment rate for black teens.

How about marching against the cable television shows constantly offering minstrel-show images of black youth as rappers and comedians who don't value education, dismiss the importance of marriage, and celebrate killing people, drug money and jailhouse fashion—the pants falling down because the jail guard has taken away the belt, the shoes untied because the warden removed the shoe laces, and accessories such as the drug dealer's pit bull.

Supposedly all of this is just entertainment and intended to co-opt the stereotypes. But it only ends up perpetuating stereotypes in white minds and, worse, having young black people internalize it as an authentic image of a proud black person.

There is no fashion, no thug attitude that should be an invitation to murder. But these are the real murderous forces surrounding the Martin death—and yet they never stir protests.

The race-baiters argue this case deserves special attention because it fits the mold of white-on-black violence that fills the history books. Some have drawn a comparison to the murder of Emmett Till, a black boy who was killed in 1955 by white racists for whistling at a white woman.

Juan Williams is a writer, author and Fox News political analyst. His latest book is "Muzzled: The Assault On Honest Debate" (Crown/Random House) was released in 2011. To continue reading his op-ed in The Wall Street Journal, click here.