in response to: "Gee, I wonder what the left would say about Martin Luther King, today, since he was always invoking the name of God and quoting from the Bible"

I would really encourage you to check out:
http://www.democracynow.org/article.pl?sid=05/01/17/164233
that is the democracy now special on MLK. That is what the real left is saying about him today.

It’s quite tragic that the “left” has been represented so poorly in the collective mental environment, for its people like MLK which are its foundation. God evoked as the underling moral fabric of our collective reality is the most powerful truthful understanding of God that you can have.

MLK teachings are my understandings morality. Does he represent yours? Did he still represent your perspective once he turned his critique towards the power structures that reinforced the prevailing injustices of system?

Or would you join in the government and corporate Medias critique of MLK? Such as Time magazine which called the beyond Vietnam speech a "demagogic slander that sounded like a script for Radio Hanoi" or Washington Post declared that King had "diminished his usefulness to his cause, his country, his people.”. Listen to the speech is that how you feel after listening to it? These corporate entities quickly turned their back on the God and morality that MLK was teaching once it questioned their hegemony.

Do these corporate entities and government public relations personal represent you? Or does the morality and justice of MLK teachings have more persuasion? Please listen to what Martin Luther King had to say about God and I would be interested in hearing what you have to say about him.