An ISIS member tells what Quranic commands guide the Islamic State:

In an interview with the journal, Spiegel Online (ISIS Link) , ISIS member Abu Sattar indicates some of the commands from the Quran that guide the Islamic State (ISIS).   He states:  "It is every Muslim’s duty to fight those of a different belief until only Allah is worshipped around the world. Everybody has the opportunity to accept Allah and to change to the right path. (Recited in Arabic from the Koran, 5. Sura, Verse 33) “The recompense of those who wage war against Allah and His Messenger and do mischief in the land is only that they shall be killed or crucified or their hands and their feet be cut off on the opposite sides, or be exiled from the land.”  Certainly the fondness of crucifixion by ISIS members confirms the importance of this verse.
But Mr. Sattar also mentions the duty of every Muslim to fight those of a different belief until only Allah is worshiped.  He clearly must be referring to this command from the Quran:  
Quran (8:39) - "And fight with them until there is no more fitna (disorder, unbelief) and religion should be only for Allah."  Moreover, we can surmise that ISIS is also influenced by this hadith:  Narrated Anas bin Malik:Allah's Apostle said, "I have been ordered to fight the people till they say: 'None has the right to be worshipped but Allah.' And if they say so, pray like our prayers, face our Qibla and slaughter as we slaughter, then their blood and property will be sacred to us and we will not interfere with them except legally and their reckoning will be with Allah." Narrated Maimun ibn Siyah that he asked Anas bin Malik, "O Abu Hamza! What makes the life and property of a person sacred?" He replied, "Whoever says, 'None has the right to be worshipped but Allah', faces our Qibla during the prayers, prays like us and eats our slaughtered animal, then he is a Muslim, and has got the same rights and obligations as other Muslims have." (Bukhari, book 1, vol. 8, #387)
With regards to non-Muslims, Mr. Sattar has this to say, from Quran 4:89:   “They (the Unbelievers) wish that you reject Faith as they have rejected Faith, and thus that you all become equal. So take not protectors or friends from them till they emigrate in the Way of Allah. But if they turn back from Islam, take hold of them and kill them wherever you find them and take neither protectors nor friends nor helpers from them.”
Our Debate Question is:  "Most Muslims choose to ignore the commands given in the Quran to fight disbelievers until religion is all for Allah.  What logical reasons would they give to ISIS members explaining why ISIS too should also ignore these commands?"