Must admit I find it strange we have people calling for an enquiry for people who have joined a terrorist organisation who has been quite frank in its views that westerners should be killed.
They left the UK, for starters that by default should have revoked their citizenship, that aside they went into an active war zone to fight an thus they were killed. They asked for it, simple.
I fail to see the whole Han wringing that happens every time we try to protect national interests, it is propagated by the media and opposition to score points and it's pathetic. Let's say the British government done nothing and they later attacked the UK killing X amount of people. Who would accept the "well we didn't want to infringe their human right yo" argument then? That's right, no one. They were scum and hopefully they died knowing that their pathetic goals of murdering innocents would never come to fruition and their sky pixies were not about to whisk them off to some magical heaven. Good riddance, burn in hell.