Great day in the history of the labor movement: The 1970 New York City Hard Hat Riot
The American labor movement wasn't always dominated by leftists. For instance, on May 8, 1970, the New York State AFL-CIO mobilized dozens of construction workers who attacked and routed five times as many hippie anti-war protesters in lower Manhattan in what became known as the Hard Hat Riot.
Many of the patriotic union members held signs that proclaimed, "America, love it or leave it." That's a timeless message.