The Quran mandates the killing of non-muslims, and hypocritical muslims.
in 9:73, it states ("Strive hard against the disbelievers and the hypocrites, and be harsh against them, their abode is Hell.") There are much more examples than this
ISIS follows the Quran letter by letter, if you disagree feel free to reply and and I'll discuss it with you.
Islam is fundamentally a religion of conquest, Mohammed and "Allah" are worse than the Jehovah of the old testament, stop saying ISIS and Muslim terrorists aren't motivated by religion.