There is a big difference in “knowing” something and being able to document it.
You actually owe him a vote of thanks for documenting antifa’s activities.
Opinion is worth nothing in court. Documentation is everything.
Theres plenty of evidence on what antifa is all about. Just go on YouTube and there is no end of clips showing what antifa is all about. The problem is that nothing will happen since antifa is a useful tool of the progressives.