Acutally, current goings-on are not unprecedented:
Obama throughout History [Rich Lowry]
On the Sack of Rome: "Any time a major urban area is plundered so quickly, it is concerning to us. We are sure the Gauls and Chieftain Brennus understand Roman worries about the utter devastation of their city."
On the Blitz: "Any time a city is bombed for 57 straight nights, we take notice. That is something that interests us. We hope all national air forces involved in this dismaying conflict behave responsibly."
On the creation of the Berlin Wall: "Any time a barrier divides people we get worried, and perhaps even chagrined. We hope all Germans can work this out amicably, and agree on construction standards and building materials going forward. We, as Americans, stand ready to observe closely."
On the boat-people exodus from Vietnam: "Any time people resort to watercraft in such numbers that is certainly notable. I'm sure the Provisional Revolutionary Government of the Republic of South Vietnam will work with its duly constituted maritime authorities to resolve this matter in a manner satisfactory to all parties.”