Unlike several New York Times columnists, Nicholas Kristof usually gets his facts straight. And in his advocacy over decades for victims of war and rapine, he's developed a signature line of argument: Okay, it may be imprudent/ineffective for the U.S. to intervene militarily. But we can do x, y and z -- a carefully calibrated and coordinated range of diplomatic, economic and sub-military measures -- to pressure a brutal dictator or warlord to stop or reduce the killing. Such has been Kristof's m.o. in columns urging action in Darfur, South Sudan, and I think, a range of other conflict zones.
His advocacy today for a strike on Syria seems uncharacteristically sloppy, a mesh of unargued or thinly argued assumptions: When slaughter in civil war escalates, it's the U.S.'s responsibility to step in. Arming Syrian rebels earlier might have built a more viable or cohesive or moderate opposition and reduced the slaughter. A punitive strike now may not only deter further chemical weapons deployment but also cause moderate rebels to spring out of Syrian soil like Spartoi.