The main problem I have with Black Lives Matter is the name sounds overly gushy and sentimental. I much prefer names like Black Panthers or Black Liberation Army.
Krystal and Saagar discuss a report from the New York Times that shows how fast public opinion has changed in response to the George Floyd protests and BLM movement.
The main problem I have with them is they are Rockefeller plants:
https://www.wsws.org/en/articles/2016/10/11/pers-o11.html
Interestingly, I know a number of Marxist-Leninists who consider BLM to be astroturf as well.