Well violence isn't the only negative consequence that the 51% of the population can bring to bear. It takes a lot less than that downing tools to bring any government to the negotiating table even if the strike is peaceful. And if the government responds with violence, that doesn't disqualify it as I'm talking about violence on the part of those seeking change, not their willingness to endure it which is a non-violent act. Also, there are cases, I believe. For example, people agitated for an end to Britain's part in the slave trade peacefully and the government pretty much shuffled its feet and said "yeah, that's wrong." Even politicians are people. (Most of them). I'm convinced there are lots of examples of laws and actions that are socially positive that were achieved without violent coercion which is what this guy believes is necessary.
Note, connecting this with my previous post about many of them wanting to bring down the state, obviously that will involve violence. But they believed that any significant social betterment was the result of violent action.