Please don't quote that reptile. Of all the reasons to resign from the currently-reigning administration, he chose the fact that Trump had decided to stop killing Syrian children. Not a good look. If the war media is refocusing its attention on him, we can expect he'll be pimping more atrocities real soon. After all the public must be distracted from its current concerns, otherwise we might spend some money on something besides armaments and prisons.
We don't destroy nations by leaving them (which we haven't done in Syria's case; there are still USA troops fighting there [0]), we destroy them by occupying and slaughtering in the first place. Keep in mind that the "gas attacks" were staged false-flag this-is-how-all-our-wars-start bullshit, which overruled-from-top OPCW investigations made clear. [1] Calling oneself "extremely anti-war" while parroting military-industrial complex submarine interventionist propaganda is fairly ridiculous. Killing more children in Syria wouldn't have saved the lives of Syrian children.
https://www.cnn.com/2018/12/20/politics/james-mattis-resigna...