Beyond Vietnam

Left used to consider him a hero, and now to them he is just another uncle Thomas.

Who, exactly? I hear yet another sweeping, ad hominem smear with no evidentiary basis. Prove me wrong.

I see a group of rioters, raising (supposedly) Black Power fists. What group do they belong to, if any, and how do they reflect "the Left" as such? The quote in my meme refers to Dr. King's 1967 speech, "Beyond Vietnam," denounced in the mainstream media as "dangerously leftist", per Life Magazine. So, to follow your lead, M. L. King is part of the Left that is denouncing him and committing the acts in your picture. Something is confused, but I don't think it's the Left, or Dr. King, or this poster.

It is a BLM riot. Is that something Dr.King would stand for?

It's not what you posed. You said the "Left," w/o any definition or specification. Dr. King was of the "Left" in the US political spectrum. So, according to your sweeping use of the term, "Left," Dr. King would ideologically approve the actions in the picture. In reality he would not, though remaining "Left.".

Sweeping use? I was very specific to the left then and the left now. Your brain sure did a lot of circles there to answer me a simple yes or no question.