Tell him to read C. S. Lewis, T.S. Eliot, Dorothy Sayers, James Hitchcock (3 Anglicans and a Catholic, all conservative) . . . sometimes the religious angle, and an appreciation for objectivity rooted in Absolute Truth (as opposed to subjectivity rooted in one’s “feelings”), can help. It may take awhile, but it is ultimately the sine qua non of most conservative thought. There also used to be a good book called The Conservative Reader. Find it.
Give him a copy of “Witness” by Whitakker Chambers if he wants to know the truth