There would be little gain from establishing a no-fly zone in Syria. Not only would the immediate risks outweigh any perceived gains in the long-term but it would not necessarily help those people still trapped inside Aleppo or other population centers.That's quite right, I think. Of the second:
U.S. involvement would increase tensions with not only Russia and other regional actors but would embroil U.S. forces in another possibly decade-long occupation and stability operation. More civilians, not less, may be caught up in the post-Assad violence that would certainly hamper efforts at rebuilding.Certainly if we ended up in a proxy war with Iran (unmentioned, but a major player on the ground in Syria) and Russia, the odds of a long period of "post-Assad violence" that cost a lot of civilian lives is high. It would also cost a lot of American lives.
The piece concludes, "Recommendation: None."