Salamun alaikum.
The core message of Qur?an is to teach mankind to be slave to Allah alone ? not to associate any partner with Him. In other words the book suggests us to accept our inner sense of justice and morality (called conscience) as our solemn obligation to the supreme authority who endowed us with the gift of life. This is reiterated hundreds of times in Qur?an by urging us to be conscious (muttaquin) and to act appropriately (amalu salehin).
A man associates (shirk) partner with Allah when he represses (k-f-r) his God-gifted conscience and intellect
On this basis, an ISIS soldier performing a ?human sacrifice? to please the deity-in-heaven (tagoot) that he worships is no different from a pagan idol worshiper performing a ?human sacrifice? to please his cult?s god. Just because ISIS soldiers? God has an Arabic name which happens to be a homonym to the name of the Master of the universe in Qur?an ? it does not make them any less pagan.
This is exactly what I feel how ISIS violates the Quran.
Like all terrorists, they interpret Allah's verses literally- especially what many people would perceive as "violent verses".For example,
Moses said to his people, ?My people, you have wronged yourselves by worshipping the calf, so repent to your Maker and kill you. That is the best you can do in the eyes of your Maker.? He accepted your repentance He is the Ever Relenting and the Most Merciful. (254)
Most of those without sound judgement will interpret as "Suicide," when in fact they forget that Allah never commands evil/bad things so people with hikmah (wisdom) applied would understand it as fighting against the evil desire that the Satan invites mankind to embrace.
Because they suppress their God given basic-intellect, they've lost the chance to spiritually evolve further so they become blinded as they continue to commit acts of evil, (disease increasing in their hearts).
Also about the sacrifice humans thing that ISIS is doing is exactly what the pagans did.