For the record, of the 20th century’s malign ideologies, Nazi ideas of who should be murdered and why strike me as slightly more odious and frightful than Maoist or Stalinist ideas of who should be murdered and why. The applicability to current U.S. events is slender, though.

More relevant is the principle that large mobs are more dangerous than small mobs, and likely to harbor more psychopaths. Apparently running out of Nazis to resist, Boston protesters threw rocks and urine-filled bottles at police. Any shortage of white supremacists can always be corrected by expanding the definition. Opponents of a $15 minimum wage are racist. Skeptics about a pending climate crisis are racist. Anyone questioning the utility of pulling down old statues is racist.

The slippery slope of civil-rights erosion is manifest every time certain members of the vituperative left open their mouths.