A reader writes:

The way our politics of fear is now constructed, there is no limit to the costs involved in nation-building in every conceivable failed state that could be a safe harbor for Jihadists. We cannot have the adult conversation about how much terrorist damage the US should tolerate compared with the costs of trying to control this phenomenon at its source. We are not mature enough as a country to have that conversation. And Obama has decided it isn't worth confronting that question now.

This is indeed what this is all about. To avoid a potential terrorist attack we are willing to invade countries and conduct wars to the end of time, if necessary. We are a country of cowards. And we're not too bright, either.