Or it could be exactly what it is. When a person shows you who they are you should believe them. Trying to find the hidden lining is comical. Trump continue to show you he is an idiot, and you continue to try to find some way to justify it. Let me give you a hint. If you look at Trump as the idiot he is, then view his tweets its very easy to see and know exactly what he is doing. When you try to make something stupid appear deep or on another level is why you seem to have a problem.
Even if Trump was trying to put some hidden meaning that the Queen is fat, it would still make him out to be an absolute idiot. The question probably isn't that Trump is an idiot, its the question of how much.
What's comical is your insistence that an idiot could become president of the United States. That's even more farfetched than claiming that an idiot could become vice chancellor of Austria.