How could a group called 'Islamic state' not be Islamist?

Only in the bizarre world of Barack Hussein Obama could a terror organization called 'Islamic state' (formerly known as ISIS or ISIL as Obama insisted on calling it) not be Islamist. This is from Phyllis Chesler.

He lost me when he referred to ISIS as ISIL, thus undercutting their
view of themselves as a routinely Islamist imperialist venture which
views not only Iraq and Syria as part of