I worry that attitudes towards BLM by both the OP and the commenters strongly correlate with reactions to this research, and that the ensuing discussion is going to be highly politicized. It might perhaps be more fruitful if parties on both sides instead try to make a series of explicit and verifiable predictions related to this research, such as whether it will be published in a peer reviewed journal without significant alterations, or whether a similar analysis on the effects of last summer’s historic wave of protests will yield similar results.
I agree it is highly politicized. I feel like this is an asymmetric demand for rigor however. I do not recall many people anyone making this objection last summer when everyone, including EA organizations, was super-keen on BLM.