Heaven forbid an American president should show some respect for other cultures and customs instead of arrogantly expecting the world to bow to him. When in Rome and all that. The almost never right wing are losing their lunch over Obama bowing to the emperor of Japan. Interesting how they conveniently forget a former president puking on the Prime Minister during a state dinner. No bad judgment there. But they'll keep worrying about the bowing, that way they won't have to contribute anything constructive to the conversation.
When most people have an upset tummy they have the sense not to go out in public and they certainly don't eat anything they can't see through.