Has it ever occurred to you that politicians who actually paid some regard to legality and thought about the long term consequences of their aggressive actions might have kept us out of the bullshit wars, based on phoney evidence and questionable legal justifications, that helped cause the radicalisation of people like this and the awful deaths of good people like Alan Henning?
Are we more secure now because of our military actions in Iraq, Libya, Afghanistan & Syria? I'd say that, because of those, we live in a state which faces ever greater threats to the safety and security of its citizens and which faces waves of refugees and migrants who are fleeing from the consequences of those actions.