Foreign adversaries planning the next big war now have two examples of the United States being unable to cope with revolutionary violence in the homeland.During the 1960s, the New Left, anti-war, Black liberation and counterculture movements spawned rioting, looting, burning, killing police and 4,000 bombings. Today, Antifa and Black Lives Matter are stoking revolutionary violence — 4,000 bombings haven’t happened yet, but the revolution is just starting.