Frankfurt, Germany. It was night on the Autobahn and I was going to see Gottfried Helnwein, an artist known as "The Razor-Blade Rembrandt." The artist's assistant, Heinz, was pushing the new Mercedes to 100 miles an hour. This unnerving high-speed delivery, on a highway built by Hitler, seemed an appropriate prelude to meeting an Austrian whose art is a biopsy of post-war Germany, with references to resurgent fascism, mass insanity, suicidal depression and childhood trauma