Start here https://blacklivesmatter.com 

Next click 'donate'.
Taken here:
https://secure.actblue.com/donate/ms_blm_homepage_2019

Who is ActBlue?
https://secure.actblue.com 

Powering Democratic candidates, committees, parties,
organizations, and c4s around the country.
Democratic party funding? ALL DONATIONS TO BLM [ http://BLM.com ] ARE ROUTED THROUGH A DEMOCRAT-ONLY FUNDING ORG.
100% OF BLM DONORS ARE DEMOCRAT?

100% OF BLM DONORS AGREE TO POWER DEMOCRAT CANDIDATES, COMMITTEES, PARTIES, AND ORGANIZATIONS WITH THEIR DONATIONS?
What % of BLM donations auto-route to [D] party affiliated networks? https://www.opensecrets.org/pacs/expenditures.php?cycle=2020&cmte=C00401224

Expenditures 2020 Cycle.
includes all contributions outside of 'BLM'
What % of total of BLM donations between 6/1 - 7/1 went to Biden for president?
What % of total of BLM donations between June 1 - July 1 went to [D] party affiliated networks?
Independent audits are important.