Rearranging the letters of 'ISIS militants' gives:
It's sin, it Islam.
(by Aronas Pinchas ) (2014) (pending approval)
Other related anagrams without their own page:
"The Islamic State militants" -> "Hate/ antisemitism still act." (by Aronas Pinchas ) (2014) (pending approval)
"The Islamic State of Iraq and Syria militant group" -> "Diagnosis: A caliphate for quite militant martyrs." (by Jason Lofts) (2015) (pending approval)
"The Islamic State of Iraq and Syria militant group" -> "Martyrs in a quest - aiming for a caliphate, it is told." (by Jason Lofts) (2015) (pending approval)
"The Islamic State of Iraq and Syria militant group" -> "Quite a strident hairy fanatical Islamist pogrom." (by Jason Lofts) (2015) (pending approval)