No, I'd say most countries naturally believe in single citizenship, which is why your renounce other citizenships when you take a naturalization oath. Also, it's hard to reconcile acceptance of dual citizenship when one believes natural born citizenship is a jus soli-only type of citizenship. IOW, if you think Obama is an NBC, then you have to deny he could ever been a dual citizen or ever possess citizenship in another country. Even he doesnt' go that far.