People keep saying 15 like she's someone lying in a cot being read Goldilocks or Red Riding Hood. When I was 15, I was aware enough to know that if I leave my family and go to another country to join a group of psychopaths that are an enemy of my country, that are all over the news hacking people to bits, there may be a little fall out if I change my mind when they get defeated.
Even back then when I was that age I would of looked at the news etc to see what is actually going on, these days with the internet providing all the information you need at the touch of a few buttons, I would sure as **** have checked out what I was getting into, and there is no way she just upped and left her entire life without having a least a bit of a look into what they are.
She was 15, she knew what she was doing... I am not buying the immature decision argument. Radicalisation sure, but a decision born out of being too young to know what she was getting into doesn't add up.
At 15 you know a huge amount. I suspect a few years later she knows a lot more that she didn't want to.
She needs a trial, but she needs to be sentence as a traitor or at the very least POW.