I haven't read the article, although i do have a general view on things like this.
My view is, you make your bed you lie in it. It sounds harsh but, this is not a decision to take lightly, and if you decide to join something like ISIS then you are stupid. If you have been coerced into joining then I feel you should make an effort to tell some sort of authority before it happens or if you have been approached. Why should you get to come back to safety once you've realised shit has hit the fan and you become scared? Don't be so stupid as to join something like ISIS and then cry wanting back into safety.
if she was a child i'd still have a similar approach, although i would have more sympathy due to a child being a bit more clueless.
This however, is a grown adult and she should be smart enough to understand that ISIS are not good people and don't care for her they will just want her to further their agenda.
I honestly don't get how some people are so fucking stupid!