That’s my point: they’d never get the evidence together to try her for any past offences - if there is any, so best to keep her away. I doubt a strong enough case could be put before a court regardless of statements she has made that would seem to incriminate herself to an extent. All too easy for defence team to cloud that with alternative interpretations. If she comes here she’ll be free.
However, there’s plenty enough evidence of potential involvement with ISIS, which is the basis I think she shouldn’t be allowed to enter the UK. Thankfully, the government has a right to make a judgement to keep her out on the basis of national security, which it has in a legal manner as found by the Supreme Court. She’ll never face proper punishment for any crimes she’s been involved in but I can live with that.