DAVID HARSANYI on the bogus concern about “threats” and “mobs.”

For those grappling with history, here’s what a “mob” looks like: furious citizens raiding the Bastille, stabbing and decapitating its governor, Marquis Bernard de Launay, and placing his head on a pike to parade around Paris streets to cheering crowds.

Or, to put it in more contemporary terms, think anti-capitalist, stone-throwing, Starbucks-hating, economic-justice thugs. Or perhaps radical environmentalists who burn down housing projects and research facilities for Mother Earth. For a domestic terrorist, you won’t need to go farther than your local Chicago university to spot a Weatherman.

But if you bring up Bill Ayers, that’s a sign you’re an “extremist.”