ISIS.
You must take a listen to all or more of his speeches to get a feel. Also, dialog with members.
They very very rarely even cherry pick verses from the Quran. Most of their ideology come from ahadith. Especially the most famous, most authentic mutawatir hadith.
I believe we all know what Mutawatir Hadith is. It means mass communicated. Many traditions, many people, many companions say the same thing.
Martyrdom
Narrated Anas bin Malik: The Prophet said, "Nobody who dies and finds good from Allah (in the Hereafter) would wish to come back to this world even if he were given the whole world and whatever is in it, except the martyr who, on seeing the superiority of martyrdom, would like to come back to the world and get killed again (in Allah's Cause)."
Narrated Anas: The Prophet said, "A single endeavor (of fighting) in Allah's Cause in the afternoon or in the forenoon is better than all the world and whatever is in it. A place in Paradise as small as the bow or lash of one of you is better than all the world and whatever is in it. And if a houri from Paradise appeared to the people of the earth, she would fill the space between Heaven and the Earth with light and pleasant scent and her head cover is better than the world and whatever is in it." - Sahih al-Bukhari, 4:52:53
Jihad
It has been narrated on the authority of Abu Huraira that the Messenger of Allah (may peace be upon him) said: One who died but did not fight in the way of Allah nor did he express any desire (or determination) for Jihid died the death of a hypocrite. 'Abdullah b. Mubarak said: We think the hadith pertained to the time of the Messenger of Allah (may peace be upon him) - Sahih Muslim, 20:4696
Murdering those who don't follow your creed
Narrated Anas ibn 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." - Sahih al-Bukhari, 1:8:387
Fight in the last hadith quoted is Fee Sabeelillah which actually is work for God, many have translated it as Fee Sabeelillah, well nevertheless, these are excellent playing fields for the practice and building of ISIL/Boko Haram and similar looney goons.
Though I do not wish to discuss the science of authentication etc, there is a concept called Mutawathir which means mass communicated stories. More people say it, the more authentic it is.
"I have been commanded to fight people until they say 'there is no God but Allah (the God)'"
If you listen to Baghdadis speeches you will hear him say all three of these concepts a lot. He repeats Fee Sabeelillah. Thats how they are brainwashed.
Peace.
