Re: Maybe @psyx
"Surely someone should have said to him, when greeting in South Korea you should use both hands or something like that? doesn't the South Korean president have advisors who are there to ensure visits go well?"
Maybe they assumed that such a pivotal figure already had someone to tell HIM that, or already had manners?
To me it comes back to it being the visitor's role when visiting someone important in a formal setting to bother reading a guide to etiquette. It's not hard.
"they should respect our culture as much as we would respect theirs when we visit their country..."
I'm not about to let the manners or attitude of a person being rude affect my manners towards anyone else in the world, though. One can't say "It should be fine to not respect other people's customs because some people don't respect mine".