...Trump voters do not need Trump to have a shared belief as they do. They need a president who will do what they believe in.
The Republicans always cower to the evil Democrats and it's obvious Democrats aren't going to do it, so then there must be an outsider who is willing to bid for the people. Trump so happens to be that person, even if the Left believes it's out of his own narcissism. So be it.
Trump is POTUS because he was duly elected to POTUS by the people.