(1) US intervention would weaken Iran. Its government will lose its most important ally.
International and constitutional law prohibit intervention. Doing so assures war crimes. Syria threatens no one. It's been invaded. Washington already intervened plenty.
With Israel, it's waging political, economic, and covert war on Iran. Doing so against both countries is blatantly illegal.
(2) "Muscular" Washington policy "could keep the conflict from spreading."
It already affects Lebanon. Spillover into Israel is possible. Perhaps other countries will also be harmed. Wars often have disastrous unintended consequences.
Doran and Boot call Syria's conflict a "civil war." There's nothing civil about it. It's foreign generated. It was planned years ago to replace an independent government with a pro-Western puppet one.
The same scheme targeted Afghanistan, Iraq and Libya. It's planned for Iran and other countries. That's how imperialism works. It's not about humanitarian intervention for democratic rule. Imperialists don't tolerate it.
(3) Partnering with Syrian opposition forces "could create a bulwark against extremists groups like Al Qaeda"."
Washington recruits, trains, funds, arms and directs opposition fighters. CIA and Special Forces are involved. It's been ongoing since early last year.
Al Qaeda is a valued asset. Their fighters have been used since against Soviets forces in Afghanistan. They're used in all US regional wars. They're also enemies when convenient to do so.
(4) US "leadership on Syria could improve relations with key allies like Syria and Qatar." Both favor no-fly and safe zones.
So do Doran and Boot. Either or both assure full-scale war.
(5) "American action could end a terrible human-rights disaster within Syria and stop the exodus of refugees"."