HIstory is set, nothing undoes what is done, so your first two sentences apply to everything than can ever be done.
A fight for white support for blacks and white funding of blacks is on the ball for what? White dependency is the only thing I see.
Time has shown us that if the argument or goal is black advancement, dependence on white society and a white supremacist power structure is not the way to go. It has failed.
You said he had no influence you last post now he used his influence, which one is it.
Garvey was commuted by Coolidge, and he was deported since he wasn't a US citizen and convicted of a crime. You have no point with regard to lowering his time, seeing that he never should have been convicted in the first place nor charged.
There are plenty of integrationist/communist, Bayard Rustin and James Baldwin off the top of my head
Easy look up Richard Wright
Richard Wright (author) - Wikipedia
I can cite you the personal writings of Engels and Marx as well