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Explain why a Roman was never to be put to death by crucifixion.
It was the most shameful way to die because of the process: you were beaten first, whipped, made to carry the cross, nailed to the cross, and then suffered for days waiting to die. Crucifixion was used to humiliate and punish the Christians, therefore, if a Roman was put to death by crucifixion, that person was associated with Christians. Romans never would associate themselves with Christianity in any way.