ISIS sounds like some sort of disgusting infectious disease.
Isis - Wikipedia, the free encyclopedia
Isis (/ˈaɪsɪs/; Ancient Greek: Ἶσις; original Egyptian pronunciation more likely "Aset" or "Iset") is a goddess from the polytheistic pantheon of Egypt. She was first worshiped in Ancient Egyptian religion, and later her worship spread throughout the Roman empire and the greater Greco-Roman world. Isis is still widely worshiped by many pagans today in diverse religious contexts; including a number of distinct pagan religions, the modern Goddess movement, and interfaith organizations such as the Fellowship of Isis.
To kill ISIS is to cut off the "Turkey" 's head.