LONDON (AP) — At the height of World War II, Hans Kohout wanted to give the Nazis advance word of a top-secret British tactic that could neutralize an enemy's air defenses, leaving major cities exposed to devastating air raids, according to secret intelligence files released Friday. The files suggest the number of Nazi sympathizers willing to take action against British forces was larger than had been thought, he said. "Many people who were never members of the fascist parties have been actuated by their anti-Semitic feelings to express the opinion that a German victory would be preferable to a British victory, since the latter would mean a victory for the Jews," he wrote in 1944. Field reports show Roberts was able to contain his utter disgust for those Brits willing to provide information that could easily have led to more carnage on the home front. The material Roberts gathered was used by the intelligence service to keep track of active Nazi sympathizers in Britain during the war.