A similar thing happened between him and Merkel, when Trump didn't understand that the EU was a unified trading bloc with a common market and that making separate trade agreements with Germany was not possible. Trump allegedly asked Merkel more than 10 times why he could not do that.
I don't think Americans still understand what a laughing stock their president is to the rest of the world. This goes beyond personal sympathies and antipathies; he is objectively a very unintelligent person and his exceptionally poor manners make things only worse.