This ideology isn't just confined to the Middle East, it's a worldwide problem that will grow and grow, they've proved this by marching through a number of countries already.
Whether we poke the hornet's nest or not we are at threat, id rather swat a few before being stung.
There was an interview with the ex squaddie that went to fight Isis, what he saw would be enough to convince most that Isis needs exterminating and soon.
Those that choose to ignore or underestimate the threat level are just as dangerous as Isis, one occesion where "I told you so" will be after hundreds more are slaughtered, how many more have to die before people understand we need to go on the offensive?