JOSH HERSH, VICE NEWS: Brian Levin realized the size of the problem last year, when he went as an observer to a KKK rally in Anaheim, and found himself caught up in a mob of furious counterprotesters.
BRIAN LEVIN, CENTER FOR STUDY OF HATE AND EXTREMISM: The Grand Dragon fell, and was immediately set upon by a mob.
UNIDENTIFIED VOICE: Get away, get away.
BRIAN LEVIN: And that was like the longest four minutes of my life. And at that point, I saw something coalescing on the hard left.