What, exactly, does that have to do with an entirely separate repo showcasing police brutality?

I'm having trouble understanding your line of argument unless you're claiming conspiracy and that this repo is in fact being ran by secret marxists. Or that all of the protesters are actually marxists. Which is insanity.

I've seen those before. So a basically unknown neo-marxist group gloms onto a grassroots movement. So what? Are you daft enough to think they speak for them now?

And, ffs, what does on earth does "trained marxist" even mean? I repeat my question: is it like a "trained capitalist"? If not, why not?

And what is your problem with that?

That proves that there is a hidden agenda within the black lives matter organisation.

What organization?

If they openly state their desires, that is the opposite of being hidden.

The point is, people should know that they are supporting an organisation that has Marxist leaders.

Which one? Who trained them? Why? Where was this 'open admission'? What is their intended outcome?

A BLM /leader/, plus the claims the organization itself makes.