I think the next Democratic convention will be a repeat of the one in Chicago in 1968. Not violent; but just as destructive to the Party.
Leftist anti semitism was on of 1968's legacies. Here's a new book from Germany on it reviewed in signandsight,
On November 9, 1969, on the anniversary of Kristallnacht, over two hundred people were gathered in Berlin's Jewish Community Centre in commemoration of the victims of Nazi Germany. Unbeknownst to them, a member of the radical Left student movement "Tupamaros West Berlin" planted a bomb in the building. The device failed to explode because the clock meant to trigger it off was connected by a rusty wire. The Tupamaros saw themselves as Germany's first urban guerillas, inspired by the Latin American role model.
This summer, Wolfgang Kraushaar published "Die Bombe im Jüdischen Gemeindehaus" (the bomb in the Jewish Community Centre). The book reveals previously unknown information on the 1969 plot, and sparked a heated debate about anti-Semitism in the German Left in general and in the 68er movement specifically. According to historian Götz Aly, "the German 68ers were wretchedly similar to their parents." Journalist Micha Brumlik pinpoints "the radical Left rebellion against their parents' Nazi generation as a contradictory process of identification with them and their hatred of Jews."