because he does not want a war, and more importantly the last thing the American people want is a war with so many living below the poverty line. Or the FSA used those weapons (we refer to the FSA as if it's a homogenous unit. When in fact it's a hotchpotch of all sorts of "rebels"). If so the question beggars; where did they get those weapons, and who would most benefit most from a war with Syria?
Death toll from car bombs in Iraq rises to 56 (AP)