My personal disillusionment with the church began when I was thrust into the leadership of the bus protest in Montgomery. I was confident that the white ministers, priests and rabbis of the South would prove strong allies in our just cause. But some became open adversaries, some cautiously shrank from the issue, and others hid behind silence. My optimism about help from the white church was shattered; and on too many occasions since, my hopes for the white church have been dashed. There are many signs that the judgment of God is upon the church as never before. Unless the early sacrificial spirit is recaptured, I am very much afraid that today’s Christian church will lose its authenticity, forfeit the loyalty of millions, and we will see the Christian church dismissed as a social club with no meaning or effectiveness for our time, as a form without substance, as salt without savor. The real tragedy, though, is not Martin Luther King’s disillusionment with the church — for I am sustained by its spiritual blessings as a minister of the gospel with a lifelong commitment: The tragedy is that in my travels, I meet young people of all races whose disenchantment with the church has soured into outright disgust.

Martin Luther King, Jr. (1929-1968) American clergyman, civil rights leader, social activist, preacher

Playboy interview (Jan 1965)
    (Source)