On May 19, 2012, 18 members of something called the Hoosier Anti-Racist Movement stormed the Ashford House Restaurant in Tinley Park, IL, armed with hammers and clubs. They attacked a small gathering of a group called the Illinois European Heritage Association.
The "anti-racist" political violence was caught on surveillance footage that was never made public -- until now. Only six of the 18 attackers have been arrested.
Here is a full video report on the attack: http://youtu.be/d2yAauUs-kk.