Nazi radio returned to Danish airwaves for the first time in more than 50 years Wednesday night when the National Socialist Movement of Denmark (DNSB) began broadcasting its message of racial purity. Grudgingly granted a license under Denmark's liberal freedom of speech laws, the neo-Nazi Radio Oasis made a pilot transmission from party headquarters in the blue-collar community of Greve, 12 miles south of Copenhagen. Anti-racist groups did not demonstrate outside the DNSB's fortified headquarters as some had expected and there was no sign of a police watch on the building, which was guarded by somechilly-looking youths in black shirts and peaked caps. Danish law allows the DNSB to preach the virtues of the white race and expressa hankering for a Denmark where everyone is strong, sober and preferablyblue-eyed. After an account of the group's year-long campaign to winits licence, DNSB chairman Jonni Hansen told listeners it was healthier for youngsters to listen to racist music than the hip-hop and rap of the ghetto and promised plenty of uplifting recordings during the next broadcast, scheduled for Sunday. There was no trace of the most sinister elements of the group's philosophy in Wednesday's program, which was punctuated by long silences and wild fluctuations in volume. In interviews Hansen has advocated repatriating immigrants -- fair-skinned northern Europeans excepted -- and stripping some 9,000 Danish Jews of their citizenship before sending them to Israel, by force if needbe. Beneath the swastika-draped portraits of Adolph Hitler and other wartime Nazi leaders in the Greve house are imported British and American magazines which revel in stories of bloody street fights with supposed (reds) and rant against Zionism and big business in phrases borrowed from Nazi Germany. Most Danes, many of whom who lived through German occupation -- and Nazi-controlled radio -- from 1940 to 1945, find the DNSB's message revolting but say today's suburban fascists are no real threat.