> The entity calling itself "The Islamic State" -- ISIS is an acronym for one English translation of its previous name for itself
I don't really see a big difference between "the Islamic State of Iraq and al-Sham" and "the Islamic State". They dropped the geographical indicator from their name. They're still there; the name without the geographical indicator is pretty transparently derived from the earlier one. There's nothing about "ISIS" that opposes or conflicts with the "new" name, nor is it even necessary for us to change our name for something according to the whims of someone else.
I don't really see a big difference between "the Islamic State of Iraq and al-Sham" and "the Islamic State". They dropped the geographical indicator from their name. They're still there; the name without the geographical indicator is pretty transparently derived from the earlier one. There's nothing about "ISIS" that opposes or conflicts with the "new" name, nor is it even necessary for us to change our name for something according to the whims of someone else.