In the U.S., the politics of the left versus the right rolls on with the predictability of traffic jams at the George Washington Bridge. It's a lot of honking. Until now. All of a sudden, the left has hit ramming speed across a broad swath of American life—in the universities, in politics and in government. People fingered as out of line with the far left's increasingly bizarre claims are being hit and hit hard.

Commencement-speaker bans are obligatory. Former Secretary of State Condoleezza Rice withdrew as Rutgers's speaker...