MLK, Christian Preacher or no?

Video: The Truth Behind MLK’s Social Gospel by Virgil Walker

I 100% agree with this video. Having done my own research on MLK years ago, reading his latest letters, looking for references to the saving gospel and explicit orthodox beliefs. I cannot in clear conscious consider MLK a brother in Christ, he was a hinderance of the gospel of Christ, perhaps even an enemy. Some other quotes:

• I’ve been to the Mountaintop (1968): It's all right to talk about the new Jerusalem, but one day God's preacher must talk about the new New York, the new Atlanta, the new Philadelphia, the new Los Angeles, the new Memphis, Tennessee. [Applause] This is what we have to do.
• Letter from Birmingham Jail (1963): the Apostle Paul left his little village of Tarsus and carried the gospel of Jesus Christ to practically every hamlet and city of the Greco-Roman world, I too am compelled to carry the gospel of freedom beyond my particular hometown.

In the above letter, as reading it, I was most hopeful for him showing elements of orthodoxy, for that letter is rich in religious language. Yet, in the end I was saddened by how MLK used Christianity as a veneer for his social agenda. MLK had no saving gospel only an American one. And this is what he left the black community with. A hope for preachers to speak about the ills of society and not the ills of sin, to speak on the freedom from oppression, and not the freedom from being a slave of sin through the gospel of Christ. By God’s grace, may “Black people” (which I’m a part of) wake up and see that MLK did help advance a cause, but not one that has eternal value. We need the gospel of the Lord Jesus Christ to go forth, not MLK’s gospel of freedom.

Soli Deo gloria