The movement that gave us the Holocaust was very much due to the Marxists in Germany, the German Revolution and the continuing efforts of those who were not killed by the Freikorps when the initial Communists insurrection was defeated. 
Hitler equated all Jews with Marxists and that was the motivation for the holocaust. 
If our society does not acknowledge the sentiments behind what is going on today which is largely a movement against the Cultural Marxism which has increasingly taken hold since the 1960s we are apt to have more and not less problems. 
Remember Patrick_G the other side can be violent also and if you are advocating violence as a solution we will end up where Germany was in 1932: Far right and Far left groups engaging in on going street battles.