As to the topic question, are liberals violent?
Old school liberals, like Bill Maher are "not" violent people. That said, the new crop of "leftists" that claim to be liberals, are absolutely "not." If a pro-republican or pro-MAGA person walks into a crowd of the new crop of so-called liberals, that person will be shouted at, spit at, have his/her hat ripped from their head, shoved and turned away. If a leftist/liberal walks into a crowd of pro-republicans or pro-MAGA people and isn't there to cause a problem, they will be greeted pleasantly and not be berated.
As to why the new crop of leftist, so-called liberals are violent, there are multiple reasons.
1. Marxism: Marxist educators have infiltrated our educational system at all levels, as well as some of our mainstream media and are also "behind-the-scenes" actors in the political arena.
2. World Economic Forum: Headed by Klaus Schwab, an acknowledged Communist, its goal and much of the heads of state and business elite are on the fast track to change the governments of the world to a "neo-Marxist world Oligarchy Government," run by the Global Elite. As for the "little-people," as Schwab has said: "You will own nothing and be happy." That is quite clearly, Communism. They believe that once a one-world-government is formed and works together, all society will be able to be managed more easily.
3. Tactics: They used the same exact tactics that Nazi's and Fascists used against their own citizens in Germany and Italy, they claim that the republicans are the Nazi's and Fascists.