When I read the May 5 New Republic article entitled “Our Friend, the Trump Propagandist,” by Ronald Radosh and Sol Stern, I thought of the novelist Martin Amis and the late critic Christopher Hitchens. They were best buddies, but on at least one occasion they reviewed each other’s work scathingly. In his 2002 book Koba the Dread, Amis excoriated Hitchens, a longtime self-styled Trotskyite, for soft-pedaling Stalin’s atrocities; in reply, Hitchens savaged Amis’s book in the Atlantic. You might expect that disagreement on such a topic would have led to an incurable rift; yet Amis and Hitchens remained close, and the former ended up delivering the eulogy at the latter’s funeral.