@dancadamorte I'm sorry but to say that there is no leadership or central demands is just completely wrong. The BLM movement has three founders, and three main people that are the face of the movement. While true it is not like a company, it does have leaders and most certainly has central demands. Here is a link to their website that gives the list of the formal demands that the founders of BLM hope to push forward through Congress, you say that "half of the groups don't even claim", well they provide the list of Black Organizations, including Black Lives Matter Network, that support these demands.
https://policy.m4bl.org/platform/