Just makes it so much worse doesn't it?

Thank you for making OP's point. They are world leaders, and here they are acting like children on a playground.

They don’t seem to realize that.

Nation-state politics often devolves to the level of children on a playground. This was one of those occasions.

Not always. That third guy, the on the left, behaves himself like a responsible adult should.

America did used to have real diplomacy, in the sense that there was an active dialogue between diplomats in America and their counterparts abroad. During the unipolar moment, they gave that up. That's beyond dangerous and frankly suicidal.

Someone should tell them.

I think you watched a different clip to the one I watched...

Citation needed.

Technically, yes, but Nition was just drawing parallels between their behavior and that of children to show how incompetent and immature they are.