Here's the thing. Not only do I not personally know a single person who identifies as being in an organization under the antifa umbrella, but I haven't even read about a specific person who identifies as such. I recognize that part of this is by design - organizations like antifa eschew figureheads, but don't you find it troubling that you can't name a single prominent member of the organization. Does that not, by itself, indicate to you that concerns about the dangers of antifa are, at least somewhat, overblown?