ISIS, this Islamic terroist group which was "spawned" (born from) the infamous Al Qaeda, has become the world's most feared terrorist army. Lately, they are news for comitting unspeakable "atrocities" (terrible acts of pain, suffering and death) against non-Sunni Islamic peoples in Syria and Iraq.
They have killed and tortured thousands of human beings, using their right-wing, ultra-conservative Islamic beliefs as an excuse to murder innocent people, including cutting off heads and crucifixtion. They are well equipped and organized.
They recently "beheaded" (decapitated) an American journalist, slowly cutting through his throat with a small knife, in order to inflict the maximum pain, before finally sawing into his neck bones and slicing off his head. This was done on camera and the video of his decapitation was posted on the internet.
This group wants to create its own Islamic state and is now at war with "infidels" (those of us who do not believe in their brand of Islam). This war is called a "jihad", a holy war to convert the world to Islam. Scary !! (V.C)
as an excuse to murder 殺人の言い訳として
inflict pain 苦痛を与える