But look at what country it worked in. The U.S.A. Do you really King's methods would have worked in Nazi Germany? In the Middle East? Against Stalin? Against Bin Ladin? Sadam? I doubt it. Also, what ended Slavery in the U.S.? The American Civil War.
The way you talk about it, the US handled the Civil Rights Movement in a completely civil way that did not involve individuals bombing churches and committing grotesque acts of murder, only to have the local authorities, i.e. the police, whose job is to serve and protect the people, not do their jobs by never pressing charges, sometimes silently supporting acts or murder and barbarism, and sometimes actively attacking marches with high pressure water hoses and brutal arrests, sometimes for no reason at all. And that makes those police officers any better than Nazis or terrorists how? And remember that the Civil War was not fought for the express purpose of freeing the slaves. It was only done during the war to undermine the Confederacy's sovereignty. And afterwards, black people weren't much better off than they were before in many places.
Now, I'm not saying at all that certain important things aren't worth fighting for. I'm simply saying that, just because they are worth fighting for, running off to die and kill shouldn't be the obvious solution but rather the final one.
EDIT: And I hope, ric, that your above "I will" isn't serious.