مُضر آل أحميّد said this quote

The Islamic State or The State of Islam are the titles under which ISIS and the like are committing their evil deeds and legalizing their crimes. Oddly, there are no such titles through the history of political Islam; we have heard of an Omayyad Empire, an Abbasside Empire, an Ottoman Empire, the Ayyubid State, and other states which made use of religion to expand their territories and control peoples’ minds and lives. These states held the names of the ruling dynasties but never Islam.