I'm not sure what point you're trying to make sorry. An interview on tv still isn't any evidence for anything and it can be taken in any way. Javid is correct in saying he can't discuss the details of the case, that's just standard practice regardless of who is involved or what the case is about. If there was a larger reason to take away her citizenship other than her joining isis, that would likely have already been disclosed as, much like her joining isis, it would be in the publics interest to know.
At the end of the day, I'm not disagreeing with anything re her being a danger and I do agree that she shouldn't be allowed back to the UK. However, she was a UK citizen, she didn't follow the requirements to have a dual citizenship so although on one "page" the UK was right to withdraw her citizenship, they also on the "other page" were wrong as they made her stateless which goes against their own ruling. I'd like to think that she won't be allowed back but at the end of it all, facts and laws are in place and they can't be bent or have things covered up to allow certain circumstances.