Images of children being ripped from their parents’ arms as law enforcement officials collect them behind tall fences have made a grim comeback under the Trump administration. Some have noted that lately our immigration policies have acquired the flavor of Nazi purges. So it’s perhaps as fitting a time as any to revisit Joseph Losey’s 1976 Mr. Klein. Robert Klein (Alain Delon) is an art dealer profiteering off Jews trying to escape Paris under German occupation in 1942—until he’s sent a Jewish newspaper, apparently by mistake, and finds himself in their shoes. Fundamentally, it’s a message film in the genre of “First they came for the socialists . . . Then they came for me.” Losey, an American communist blacklisted from Hollywood, mounts a suspenseful argument that the scariest part of fascism isn’t a foreign military invasion, but the easy transformation of once trustworthy, familiar people and institutions into instruments of cruelty, violence, and exclusion.