It was "the choice of the people" in Nazi Germany (30 million people) to support the murder of their patriotic, Nazi Jewish neighbors. If not, it would not have been done. It was the choice of the Russian people to support the destruction and expropriation of the property of their middle/ upper-class neighbors along with the murder of about 20 million farmers who resisted agricultural collectivism. It was the choice of the Chinese people to murder or imprison all their intellectual or educated neighbors. Were their leaders immoral for carrying out their choice? Was their choice moral? Is anything the people choose moral? Can't a people make an immoral choice? Or do you define mob rule as moral rule?
Do you hide behind the mob to avoid taking responsibility? You can't escape judgment​ by claiming you were just following the mob or following God's law.