Seriously, imagine being a class reductionist. I could never be one. Just the pervasiveness of racism, bigotry, misogyny, transphobia, homophobia, et al that I have personally experiened tells me that there are other dynamics that intersect with class that are very, very relevant. But sure, tell me all about how the white guy who quotes black crime stats and seeks out suburbs that are virtually all white to live in would totally be a good comrade if you could just have 15 minutes to explain class consciousness to him. Or the evangelical nut who somehow in 2021 considers transgenderism a sin and a mental illness akshully only sees is that way because of class. Go ahead.
Seriously if you see any class reductionism here just tag me, I love banning class reductionists. It's fun for me.
MLK did have a strong program for economic justice he thought was instrumental to alleviating the other social ills. He found that a strong material analysis was the best cure for rascism, and I am inclined to agree with him. It's like if the workers of the world unite things will get better or something.