Comparatively, ISIS has the reputation of being more extreme than AlQaeda. The many gruesome beheadings of Western captives certainly catapulted ISIS to global attention, while its military exploits...

Comparatively, ISIS has the reputation of being more extreme than AlQaeda. The many gruesome beheadings of Western captives certainly catapulted ISIS to global attention, while its military exploits in Iraq and Syria were effective in building a dominant global image.