From Jeff Head – documenting instances of “Sudden Jihad Syndrome” in the U.S.  SJS is defined by Jeff as:

Sudden Jihad Sundrome is individual or small, un-attached groups of radicalized Islamics who decide to carry out Jihad, or Holy War, against those amongst whom they live. It usually involves a single person, but may include small groups, who are radicalized in their Mosques, their readings, their conversations, or otherwise, and who then decide on their own to wage war against those whom they live amongst.

Worth checking out!