Again, you're naive to think MLK happened in a vacuum, black people were rioting all over the united states destroying property and setting cities on fire, you can't discount that. Whites were afraid and MLK was a more attractive alternative at that point. White people (the majority) didn't like blacks who were sick and tired of being subjugated and took direct action (often with violence)? Wow, what a surprise that they wouldn't celebrate the black panthers, are your retarded? These are the same people who will shout about MLK's 'nonviolence' but nary a peep when it comes to his views of poverty/socialism/pacifism (which doesn't really get talked about in school or the media so every few people know about it). It's almost like whites cynically use MLK's image to their own ends.
Also, people don't respond well to violence?
Do you even know the history of your own country? If our country listened to the loyalists, we'd still might be under british rule
http://en.wikipedia.org/wiki/American_Revolution
Another example:
http://en.wikipedia.org/wiki/French_Revolution
edit: Not to mention Irish independence.
http://en.wikipedia.org/wiki/Provisional_Irish_Republican_Army