How many?

[vschanoes]

"O when may it suffice?"
                -- W. B. Yeats

A very, very incomplete list.

Henry Smith
Jesse Washington
Laura Nelson
L. D. Nelson
Will James
Anthony Crawford
Isaac McGhie
Elmer Jackson
Elias Clayton
Emmett Till
James Chaney
Michael Donald
James Byrd, Jr.
Patrick Dorismond
Amadou Diallo

Trayvon Martin

And yet when Jeremiah Wright wasn't supposed to say "God damn America."

Well, I'm white.  I can say it.

God damn America.