See this video where BLM co-founder describes herself, and the other co-founder, as “trained Marxists”. https://nypost.com/2020/06/25/blm-co-founder-describes-herself-as-trained-marxist/
And while you’re at it, check out blacklivesmatter.com, especially the part that describes their beliefs, under the “About” section.
I was just initially questioning if the shooters were actually BLACK skinned "armed Marxists". I see that they were.