The IS fighters will come back and say Mummy I'm home
It's already happened
The mother shopped her ISIS returned son to the authorities who didn't even know he was back. (No border controls you see)
Then mummy if ISIS terrorist got upset because son got 9?? Years. She claimed it was excessive.
We had internment in the 1st and 2nd World Wars. In WW2 we used the Isle of Man In Ireland we also used internment during the Troubles. It's a reasonable response to contain a perceived possible threat within when hostilities have been declared.
But no formal war will ever be declared
You cannot round up millions of people based on the religious views
You are very constrained in what you can do by EU ECHR UN etc
The only the solution the Govt has is to tell us to stay calm, to deny it's anything yo do with I slam and to carry on kicking the can down the road in the hope that we dint notice that a certain % of our population is being slaughtered in the name of religion in our country each year.
You know, just like they did after July 7, Lee Rigby.....