Tensions almost came to a head at yesterday's heated rally over the planned mosque and community center near Ground Zero. A man wearing a white athletic skull cap was mistaken for a Muslim as he walked through the crowd, which prompted an angry confrontation, all of which was captured on video. One protester in a blue hard hat calls him a "coward" at one point, which almost incited a fight; later, someone chants "Mohammed is a pig." You can see the full video below.