Hopefully that's the case generally, but the problem is with the branch of identity politics that goes from "we've been mistreated and want that to stop" to "yo

Hopefully that's the case generally, but the problem is with the branch of identity politics that goes from "we've been mistreated and want that to stop" to "you share some physical trait with people from the past who did bad things, so you're bad too". The former is something that can unify (e.g. the civil rights movement of the 60's) while the latter is inherently divisive, which makes it really hard to accomplish anything. BLM is a mixed bag as far as examples go - it's loose organization has resulted in a pretty broad message, and sometimes that message has gone well into the range of the bad type of identity politics (see e.g. https://torontosun.com/2017/02/11/black-lives-matter-co-founder-appears-to-label-white-people-defects/ https://torontosun.com/2017/02/11/black-lives-matter-co-foun... ).