I would say anyone who supports an organization supports their understanding of the goals of that organization. If I support an organization, but the leaders have an agenda of which I am not aware, that says nothing about me.
Isn't it kind of foolish to support an organization without knowing what they are all about?
If I didn't know that the Nazis were all about genocide and murder, and I started going around saying what great people they were, shouldn't there be a point where I am responsible for learning what they are all about?
And if I avoid educating myself and I go around supporting Nazis in ignorance, am I not still ultimately responsible for the positions that I advocate?
If you would like an example of BLM goons striving to prevent white people from protecting themselves from black aggression, look at the case of Amy Cooper.
A black man was threatening her in the park, and she called the police and truthfully described everything that was happening, and for merely calling the police when she was being threatened she has had her career destroyed and is being prosecuted.
Another example is George Zimmerman. They tried hard to lynch him for justifiably defending himself from a murder attempt.
Another example is Jillian and Eric Wuestenberg from the Detroit suburbs a couple days ago.