BUT IT WAS IGNORED, OR CHEERED ON, BY THE PEOPLE WHO ARE NOW SCREAMING “INSURRECTION:” Flashback: Violence flares in Washington during Trump inauguration. “Black-clad activists among hundreds of demonstrators protesting Donald Trump’s swearing-in on Friday clashed with police a few blocks from the White House, in an outburst of violence rare for an inauguration. . . . In the violence, knots of activists in black clothes and masks threw rocks and bottles at officers wearing riot gear, who responded with volleys of tear gas and stun grenades as a helicopter hovered low overhead.”