Saul Alinsky denounced the Black Panthers and advocated for non-violent protest, but he is evil
As he said in his "Letter From Birmingham Jail", "You may well ask: "Why direct action? Why sit ins, marches and so forth? Isn't negotiation a better path?" You are quite right in calling for negotiation. Indeed, this is the very purpose of direct action.
Nonviolent direct action seeks to create such a crisis and foster such a tension that a community which has constantly refused to negotiate is forced to confront the issue. It seeks so to dramatize the issue that it can no longer be ignored. My citing the creation of tension as part of the work of the nonviolent resister may sound rather shocking. But I must confess that I am not afraid of the word "tension." I have earnestly opposed violent tension, but there is a type of constructive, nonviolent tension which is necessary for growth." *bold added for my emphasis
It seems that he strived to create tension with his protests. They were very disruptive as well.
As far as streets go, do you think there was no disruption that resulted from the Selma to Montgomery march? I'm pretty sure that stopped some traffic.