Oh, and by the by...Dr. King was protesting the racist policies of white southern Democrats like George Wallace, J. William Fulbright and Al Gore, Sr. 

Hey Bossman, why no mention of racist southern Democrats like Strom Thurmond and Jesse Helms?  Oh wait... they became Republicans. 

Wallace left the Democratic Party too.  As for Al Gore Sr.:

Gore was one of only three Democratic senators from the eleven former Confederate states who did not sign the 1956 Southern Manifesto opposing integration, the other two being Senate Majority Leader Lyndon B. Johnson (who was not asked to sign) and Gore's fellow Tennessean Estes Kefauver, who refused to sign. South Carolina Senator J. Strom Thurmond tried to get Gore to sign the Southern Manifesto, but was told "Hell no" by Gore. Gore could not, however, be regarded as an out-and-out integrationist, having voted against some major civil rights legislation including the Civil Rights Act of 1964. (Gore later claimed that the 1964 vote was his biggest mistake.)

http://en.wikipedia.org/wiki/Albert_Gore,_Sr.

Not saying that Gore Sr. was enlightened on race by the standards of today, but for his time and place in history, it looks like he showed some backbone at times.