What Should Be Done.?

[Britkid]

Throughout history, if you fought for the enemy, you were guilty of treason and hung. I'm not saying hang them, but is not what they are doing Treason

Treason is no longer a hanging offence. And anyway we are not at war. Although I do not agree with IS, in the past British citizens have gone to war in other countries for ideological reasons, without sanctions being placed on them when they return.