malcom x the most radical of all
Just a quick point first of all.
The film Malcolm X was a very very poor rendition of the book. the book is awe inspiring.
But in terms of malcolm X and MLK. MLK was establishment. His calls for pacificist resistance and his christian background meant that any change was within bounds that where tolerated by America then and now.
If you look at the historical roots of the Black slaves in America, they were 30% Muslim and 70% animists. They were forcefully converted to Christianity over time. We know this through historical documents and some great biographies of black slaves at the time. Because of the nature of their capture the west african muslims were literate and far more educated than the white slave owners at the time.
And so MLK was part of that , acceptance of a people forced into a religion and cut of from their historical roots.
Malcolm X was the complete opposite. he used the name X to designate that his ancestoral name was stripped of him and that his roots and legacy lay with a different culture and people.
At the beginning Malcolm X was part of the Nation Of Islam. An organisation that taught that white people were a scientific experiment and the work of the devil.
As time went on he embraced islam, that advocated brotherhood based on Belief and not race.
This was far more threatening to the establishment. The implications of a black population identifying with their historical roots and connecting with the huge world wide muslim population was a direct threat to Americas "be what you want , but within bounds".
This is why he was assasinated, and this is why his legacy is far more powerful than that of martin luther king
Some good articles can be found here
http://muslimwiki.com/mw/index.php/History_of_Islam_In_America