Hazir has already explained this to you but you seem to be unwilling or unable to understand. She voluntarily went to join a terrorist group in a warzone that was beheading people.

We will likely never know what if any atrocities she personally commited there and it doesn't matter. Its not like we have CCTV surveillance across the whole of IS territory to see what vile deeds she commited. The law makes her very presence there a crime.

She made her own choice. I have more sympathy for her victims than her.