A fair point, i don’t have much to back that up but i’d defer to @Dire here and say he’s most certainly benefited from a very privileged education. I mean in comparison to chump, which admittedly is an extremely low bar, whom i can’t imagine applying himself to mastering english let alone anything else.
Yes, he is well known for his outright racism and cultural blindspots as you point out; he’s another british empire apologist and longs for the glory days when we subjugated a quarter of the global population. But he certainly has cultivated this façade of being a mr. bean character that i think led to him being elected mayor by people amused by his antics on panel shows and the like.
Yeah, he’s quite a smart man with an excellent education and a very posh background. The befuddled buffoon act is mostly an act, unlike with Trump whose brains are leaking out of his ears as we speak.