Wednesday night in downtown Washington, D.C., as tall black fencing was being set in place around the White House, hundreds of millennial protesters gathered under the intense scrutiny of riot troops armed with batons, guns, rubber bullets, tear-gas canisters, and flash grenades.

A young woman yelled into a bullhorn, “If your friend makes a joke that’s a little too micro-aggressive, please check them because micro-aggression turns into aggression!” The crowd applauded.