Col. Rex Applegate was an athority on riots. His book "Kill or Be Killed" explains exactly how the old Communist started and controled riots' These rioters today use the exact same tactics. See:
https://books.google.com/books?id=4fSRLO4iRpAC&pg=PP14&lpg=PP14&dq=Col.+Rex+Applegate,+Communist+Professional+Mob&source=bl&ots=S_qYEuR9kK&sig=ACfU3U0p5aRalJ4hvpZSLG2THfjggAN38A&hl=en&sa=X&ved=2ahUKEwjMtd3k3vrpAhW0RjABHaHcDrQQ6AEwA3oECAcQAQ#v=onepage&q=Col.%20Rex%20Applegate%2C%20Communist%20Professional%20Mob&f=false