They feel a long history of persecution at the hands of the media and the elites. They are the perpetual victim. Their way of life, their religious beliefs, their values are all under assault by twenty-first century culture and societal evolution.
Trump fights back! Who cares if he is rough around the edges, amirite? We'll return America to the good old days (whenever they were)!
It might be understandable, but that does not make it right.