The US and United Nations have both condemned Syria's initial attack, but not Turkey's retaliation. "From our perspective, the response that Turkey made was appropriate," US State Department spokeswoman Victoria Nuland said yesterday, according to WSJ. "The intent in sending a very strong message was to deter future aggression."
The UN Security Council "condemned in the strongest terms the shelling by the Syrian armed forces" – a move that required the approval of Russia, which has steadfastly rejected further action against Syria and been reticent to condemn some of its actions.
Soner Cagaptay, director of the Turkey Research Program at the Washington Institute for Near East Policy, writes in a Washington Post commentary that the attack lays bare the stark differences of opinion between the US and Turkey when it comes to Syria. While the US is treading carefully due to impending presidential elections and war fatigue among Americans, Mr. Erdogan sees its limited response as a sign of "indifference," Mr. Cagaptay writes, noting that Erdogan criticized President Obama for "lacking initiative" last month.