My how very honest of I.S.I.S !
now waiting for N.O.W. to condemn them...
I think if one wanted to one would find the actual judgments regulating the practice of slavery in the modern world from a legalistic Islamic perspective. Sunni Islam decides things in a mechanistic, predictable, and internally logical manner. I’m sure the fellows at Al Azhar in Cairo would be able to pronounce definitively. I don’t think they would care to take up the question at the moment though. The preponderance of precedent is likely to force a rather inconvenient result; i.e. ISIS is right.