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Same way any populist gets voted in. Tell people their simplistic, prejudice-driven understanding of the world is true, promise them that if brave people stand up and back him he will apply the simplistic, prejudice-driven solutions they believe will fix all that they think is wrong with the world, and tell them anyone who says reality is complex and the simplistic, prejudice-driven solutions won't work is either out to con the decent public or is just too dumb to see what is obvious.
And simplistic, prejudice-driven people believe him because what he says is exactly what they already believe to be true.
Dunning Kruger, basically.
I'd say a very kind and in depth analysis.
Mine take is clueless fuckwit. But he still gets voted in. HOW?