Support them.
Exactly why is it so difficult for people to understand they are not protesting the military. The protest is about police brutality toward the black community. That should be crystal clear by now.
if I acknowledge that, then I am forced into some uncomfortable self-reflection that might prompt a change in my behavior or actions. If I move the goalposts, so to speak, to something that is very easy to get behind, then I am safe to carry on with my comfortable life.