“But the safety of the people of America against dangers from foreign force depends not only on their forbearing to give just causes of war to other nations, but also on their placing and continuing themselves in such a situation as not to invite hostility or insult; for it need not be observed that there are pretended as well as just causes of war.”
John Jay, Federalist No. 4, 1787

As noble as it sounds to punish Syria for the use of chemical weapons, is it just cause?