I think it has less to do with superiority than many people believe. Consider the gist of this idea I made up now: If a person is considering ideas (especially

I think it has less to do with superiority than many people believe. Consider the gist of this idea I made up now: If a person is considering ideas (especially political ideas) then they might view those ideas as being held by a person like themself. Some ideas are very easy to picture being held by a very similar person (e.g. spicy food), but the more complex the idea (e.g. Trexit) the more difficult it becomes to conceive of the mindset that the similar person would need to have in order to have reached the differing conclusion. The key here is that it's not really about a differing mindset, so much as different circumstances that construct the differing mindset. This, I assert, is very difficult to account for completely without simply accepting all views at face value as both perfectly valid and a complete mystery, unknowable outside each person's mind. As such, it is inconceivable to the person who thinks they understand both the issues at hand and the mind of the relevant populace to reach a conclusion that contradicts the logical consequences of the (broken) assumptions, and thus the conclusion is that the one who holds such opinions is an illogical dunce, and unacceptable in this rational age. In actuality the assumptions are broken in a subtle way such that it is easy to miss the leap made to broad-brush painting.