Outrage at the tactics of ISIS is certainly
justified. But fears that it presents a
worldwide security threat are not. Its
numbers are small, and it has
differentiated itself from al Qaeda in that
it does not seek primarily to target the
"far enemy," preferring instead to carve
out a state in the Middle East for itself,..."
http://theweek.com/articles/567674/why-isis-threat-totally-overblown