There are an estimated four hundred British fighters currently fighting in Syria. The question as to how the Muthanas of this world join designated terrorist groups like ISIS is more complicated than the media would like you to think. The story of Aseel and Nasser Muthana illustrates this point well.
With Iraq it was a case of naivety, blind stupidity or a gamble that has been first gradually and now speedily evolving the wrong way thanks to a new player the Syrian war created called ISIS. It's an extremist pan Islamic war machine determined to create a Mid East wide caliphate. And it may force NATO back into this land...this time oil is at stake...the magic phrase for military action.