Do you also believe BLM protest were marxist, because the organizers were trained marxists (their own words)? Can a white-supremacist help an old lady a cross

Do you also believe BLM protest were marxist, because the organizers were trained marxists (their own words)? Can a white-supremacist help an old lady a cross the street because of his kindness or does he always have an ulterior white-supremacist motive? What are the demands from the protesters that make this protest white-supremacist?