Right-wing authoritarianism predicts persecution and harsh sentencing more strongly than social dominance does.

Evidence

Social dominance and authoritarianism correlated . and . with willingness to help persecute “radicals,” . and . with sentences handed out in the Trials situation, . and . with acceptance of myths about rape, and . and . with willingness to repeal Canada’s Bill of Rights. While all these pointed in the expected direction, the RWA relationships emerged significantly stronger in all cases except Rape Myth. — John T. Jost and Jim Sidanius, Political Psychology, 979