I guess the authors of the Commission on Racial and Ethnic Disparities didn’t agree to the job for a quiet life. Even so, the sheer bitterness of the volley directed at them by the grievance industry must have taken them aback. The reaction from the left has been straight out of the Marxist playbook: don’t bother to engage with your opponents’ arguments, just try to delegitimise them by attacking those opponents’ credentials and questioning their right to speak at all.