Nationwide, blacks and whites are victims of homicide in roughly equal numbers, yet 80 percent of those executed had murdered white people.
Since 1976, Texas has carried out 470 executions (well more than a third of the national total of 1,257). You can count on one hand the number of those executions that involved a white murderer and a black victim and you do not need to use your thumb, ring finger, index finger or pinkie.
Whereas, from watching television shows and reading the crime coverage in the New York Times, we know that whites murder blacks all the time, white lacrosse players rape black strippers all the time, 62-year-old white French presidential candidates are "forcing" 5'-10" black hookers to perform improbable acts, etc.
If more whites murdered more blacks, then more whites could be executed for murdering blacks, which would move us closer to racial equality, thus making the death penalty less racist. And that's the really important thing.