Maybe there is some sort of mental crisis in such that it is happening in people's worldviews. Like that science, being what it is, is pushing role of God from what ever his role was imagined in nature, which created a crisis in religious people that they embraced a man that wants to turn progress into retrogression. So maybe when he says "Make America Great Again" they hear that he'll resurrect dead God again by bringing them back into the past.
teachings of the Bible are so muddled and self-contradictory that it was possible for Christians to happily burn heretics alive for five long centuries. It was even possible for the most venerated patriarchs of the Church, like St. Augustine and St. Thomas Aquinas, to conclude that heretics should be tortured (Augustine) or killed outright (Aquinas). Martin Luther and John Calvin advocated the wholesale murder of heretics, apostates, Jews, and witches. - Sam Harris, "Letter To A Christian Nation"