The one thing that Hagel, Kerry and Brennan all have in common, besides being Washington insiders, is that they all agree that terrorism is basically a misunderstanding. All three fancy themselves men of the world who know more than the peasants back home because they have spent a few days being shepherded through high level meetings in Brussels, Riyadh and Beijing.
They have spent decades marinating in talking points and they know, for example, that terrorism is due to poverty and that Islamic terrorists aren't really Muslim, they just try to convince us that they are to trick us into going to war with Islam. Most of all they know that we can't beat the terrorists on the battlefield, all we can hope to do is wage a war for their hearts and minds, empowering moderates by resolving grievances until the extremists are discredited and peace reigns on earth.
