Am I the only one that thinks this is the wrong decision? She's British and is our responsibility.
Let's say someone is born and raised in America to Canadian parents. Then as a child they move to Belfast and join the IRA. Britian says "America what the fuck you sending terrorist over here for" then America goes "That person is a terrorist, we revoke their citizenship so it's not our problem now it's yours".
The real truth of the matter is UK has a problem with immigration from certain parts of the world and with certain groups in the UK. The soon we face up to that the sooner we can do something about it.
Begum joining ISIS as a child is a failing of the UK.