There is no reason to repeatedly bring up the obvious fact that grooming requires she had to take steps to join ISIS unless you are trying to undermine the degree to which she was abused. If you aren't attempting to victim blame her, then stop doing it.
She should be placed into a deradicalization program. If there is no evidence of her committing a crime then she should not be imprisoned. That's not a controversial statement, you can't just imprison people because you don't like their ideology in the absence of a crime.
And this is where our wires were crossed then. She definitely needs to be deradicalized for sure but I do think that joining a terrorist organisation should have repercussions in and of itself that include jail. I mean people get jail for significantly less. It goes beyond ideology IMO when the group you are a part of is a terrorist faction responsible for countless deaths.
But that doesn't mean I think we should just jail her and forget either. Realistically that's probably more dangerous as she could radicalize others in prison. Or that she wasn't a victim in any sense. Just that personally I think joining ISIL should be grounds for charging with aiding a terrorist faction in itself.
I guess that's the root of where we disagree.