I am pretty sure everyone has seen this video below... I did not think that much about it when I first saw this video.  But after you see it 100 times or so I could not help but to think that the man was doomed regardless. 

First he was a Christian, second his mom instead of his dad pleaded for his life. 

ISIS probably heard about the video, but they don't care what a woman has to say.  Heck the group steals/kidnaps and enslaves women and children for profit.  That tells you right there to them a woman is the dirt of the earth.  Men are superior to a woman, so a woman doing a mans job is an insult. Sotloff's mother was doomed before she uttered her first word.

The Guardian: Sotloff mother pleads for sons life