People who cannot distinguish between fact and fiction are the support of totalitarism

«The ideal subject of totalitarian rule is not the convinced Nazi or the convinced Communist, but people for whom the distinction between fact and fiction (i.e., the reality of experience) and the distinction between true and false (i.e., the standards of thought) no longer exist.»
Hannah Arendt, The Origins of Totalitarianism

These individuals tend to deny the facts, or they seek to select among the facts those that confirm their beliefs, or if they do not find them, they create what they call alternative facts. They also employ a double standard to evaluate friends and adversaries, whom they tend to consider as enemies.