I dunno know what the Marx quite has to do with King. Very different kinds of revolution, the main one being non violent.
MLK Jr.'s march was more violent than the BLM protests were, and MLK Jr. was the moderate option compared to the Black Panthers and Malcolm X. MLK Jr.'s radicalism is intentionally blunted and obscured.
Furthermore is kind of tragic what happened with Lenin's legacy, his thought being blunted similarly into stalinist autocracy
It was more Kruschev onward where the Soviet system started to meaningfully diverge from Lenin.
As soon as Liberals stop using it to mean Communist.