Her citizenship was stripped for nothing more than political point scoring. The Government knew that if they brought her back to the UK, the public outcry would be huge but only because she was so high profile due to her age and sex. They have brought back many people who fought for ISIS and placed them in anti radicalisation programmes. A lot of them males who actually fought for ISIS.... Had her story not have made the news for being a young girl who fled there, she would have been back a long time ago.
https://www.ft.com/content/11fd7c00-...4-fbbacad9e7dd
"Of the 900 Britons estimated to have travelled to fight with Isis, around 40 per cent have already returned, 20 per cent are thought to have died and the remainder, around 360, are still in the Middle East."