I never claimed brainwashed, uneducated or stupid. Far from it. But many major important parts of british history are glossed over. Much of the empire is taught as though britain was a trading partner rather than brutal occupier, the Irish plantations are glossed over as an unavoidable famine, ww1/2 are celebrated as the strength of the empire, and the postwar agreements and decisions which led to the current EU are mentioned in a sentence. These are massively important periods which directly explain huge parts of britain's "influence" over the rest of the world, and the information is available quite publicly, just never taught to children.

If people at large understood what happened and why we have the institutions we currently have, they are shown to be far more likely to be in favour of them.