The dirty little secret ... they are yearning for casualties, severe casualties. On all sides. So they can both grieve and feel vindicated. Lack of grief is not an acceptable tradeoff for lack of vindication.
These people are mentally ill, and news units just can't resist putting them on the 6 o'clock news. "Could you do a street theatre thing or get some lifesized puppets or something ... we covered a die-in already this week. Do you have any naked people or anyone who will set themselves on fire?"