What's happened is a vacuum was created where a heavy-handed government is needed. The maniacs who previously were dealt a heavy hand filled that vacuum.
They're like the book LORD OF THE FLIES. ISIS is emotional, social, cultural, and ethical midgets who only know how to destroy the institutions that used to keep them in line. Obama was calling them the JV when we were cyber-screaming to disintegrate them when they were marching in a column into Iraq.
Their trajectory seems like ours in reverse. Western Christendom had its Dark Ages followed by a Renaissance and an Enlightenment. The Muslim world had an early Enlightenment followed by Dark Ages.