the more educated people tend to vote either liberal or left
And this might be the reason. More educated, middle-class, from large cities are ‘the elites’, but not a significant majority. Poor, less educated people, from rural areas feel excluded in the world made by and for ‘the elites’. So they are going to vote against what the elites want. And, on top of that, the opportunistic rich ‘1%’, with means to influence politics, abuse those feelings for their own gain.
And this might be the reason. More educated, middle-class, from large cities are ‘the elites’, but not a significant majority. Poor, less educated people, from rural areas feel excluded in the world made by and for ‘the elites’. So they are going to vote against what the elites want. And, on top of that, the opportunistic rich ‘1%’, with means to influence politics, abuse those feelings for their own gain.