I hate to remind people, but the organizers welcomed the violence, even as they preached non-violence.
MLK's Southern Christian Leadership Conference came to a screeching halt in Albany Ga after the local sheriff read Gandhi etc... and realized being arrested was part of the tactic. MLK's cause was just - but it is as you say...
And if you remember that violence shocked a nation precisely because it was so outrageous. People were being treated as less than people because southern democrats (just like modern liberals) did not value those lives