According to recent propaganda from Islamic terrorist group ISIS, "infidel" women are completely justified as being sex slaves under Muslim teachings.

"Before Shaytan [Satan] reveals his doubts to the weak-minded and weak hearted," the latest issue of propaganda magazine Dabiq proclaims, "One should remember that enslaving the families of the kuffar [infidels] and taking their women as concubines is a firmly established aspect of the Shari'ah that if one were to deny or mock, he would be denying or mocking the verses of the Qur'an and the narration of the Prophet ... and thereby apostatizing from Islam."

ISIS claims that the group's revival of slavery is based on the minority Yazidi faith that actually predates Islam. According to the Dabiq magazine issue, this slavery is seen as a spoil of war and a tax of sorts. "Unlike the Jews and Christians, there was no room for the jizyah (tax levied on a section of an Islamic state's non-Muslim subjects) payment. Also, their women could be enslaved unlike female apostates who the majority of fuqaha say cannot be enslaved and can only be given an ultimatum to repent or face the sword."

Christian blogger David Wood expands on certain verses in the Koran that ISIS members believe justify how they're treating their enemies. In a new video, Wood discusses the ten verses and provides historical context for each one to help non-Muslims understand, but not necessarily empathize, with the terror group.

"When the sacred months have passed, slay the idolaters wherever you find them and take them captive, and besiege them, and prepare for them each ambush," Wood reads on his most recent video from Koran 9:5. "But if they repent and establish worship and pay the poor-due, then leave their way free. Lo! Allah is Forgiving, Merciful."

Another verse from Koran 5:33 mentions more gruesome circumstances. "The punishment of those who wage war against Allah and His apostle and strive to make mischief in the land is only this, that they should be murdered or crucified or their hands and their feet should be cut off on opposite sides or they should be imprisoned; this shall be as a disgrace for them in this world, and in the hereafter they shall have a grievous chastisement."

Late last week, two Austrian teens showed remorse for leaving their Vienna homes to join ISIS, and many more are following suit. The CIA estimates that there are currently 31,500 ISIS members in Iraq and Syria with hundreds of foreigners joining their ranks from Europe and the United States.