Yes, I agree that Willy's a psycho according to our definition of psycho, yet in Nazi Germany he was, alas, a good German, which I take to be the point. Uncle Charlie was American, and we don't, as a rule, endorse murder of the kind he engaged in, so he's a sicko by our standards. He'd have fared much better in the Third Reich. Willy wouldn't have got too far in America with his murderous ways, though who knows, maybe he'd have channeled his energy and survivalist instincts in other directions. By the end of Lifeboat everyone but Joe had become a killer, which isn't a particularly flattering picture of humanity in general, whether shaped by fascism or democracy. We're all just a few steps away from being murderers, Hitchcock and his screenwriters seem to be saying, add a dictator or take away food and water and any one of us could go feral, which strikes me as pretty close to the truth.