Executing an innocent man is really, really horrible. So is executing someone who was too young or too mentally deficient or too crazy to be fully responsible.
Executing a man who shot someone in the course of a two-perpetrator, two-victim robbery in which one of the victims died: not so much, even if it was the other victim, shot by the other robber, who died.
I can understand outright opposition to all executions; the whole practice is a little too close to human sacrifice for comfort, and the fact that Texas so dominates the national execution statistics suggests that there’s something a little creepy about Texas.
But if you’re going to object to specific executions, try to stick to cases where the person being executed has some more claim for clemency more convincing that a bad aim.
Yes, it does seem bassackwards to execute the accomplice while the actual killer gets life in prison instead, but it’s not the sort of injustice that makes me lose much sleep.