Usually, if you're playing the sovereign nation game and your next-door neighbor violates your airspace and bombs the bejabbers out of you, killing your soldiers all out of the blue, you raise a stink about it.
Unless what they were bombing was destined to be your secret nuke facility.
EDIT: I really wish the Syrians had gone to the UN in a snit, however, because "Officer! Sumdood stole my dope!" stories are my favorite dumb crook yarns.