In Nigeria, the group called Boko Haram pledged allegiance to the group that calls itself the Islamic State. In the Sinai region of Egypt, the Egyptian military fights Islamic State insurgents. In Libya, the Islamic State has seized a lot of territory and became infamous when they beheaded 21 Coptic Christian Egyptians simply for being non-Muslims and then posted a video of it. And now the Islamic State has carried out attacks against shiite Mosques in Yemen, killing more than 140 people.
ISIS is an acronym for “Islamic State in Iraq and Syria” which was what the group previously called themselves. But when they decided that they weren’t going to settle for just Iraq and Syria, they wanted all Muslim countries (and by that by the way they don’t mean just all currently Muslim countries, they also mean countries that were previously Muslim, including for example Spain, Portugal and Israel) they changed their name to simply “Islamic State”.
The fact that the group is now active in at least 4 other countries apart from Iraq and Syria illustrates that it is misleading to use their former name. Yet for some strange reason, U.S. media persists in using it.