THE PALESTINIAN GUERRILLA group headed by terrorist mastermind Abu Nidal said Friday it would pay for the defense of El Sayyid Nosair, who is accused of murdering Rabbi Meir Kahane in New York . . . VIOLENCE BETWEEN HINDUS and Moslems broke out in southern India Friday and at least 16 people were killed in stabbings, news reports said. Four others were killed elsewhere in the nation . . . A LOS ANGELES JUDGE issued an arrest warrant Friday for actor Corey Feldman upon learning he had been arrested hours earlier for driving without a license and had been suspended from a live-in drug program, prosecutors said. Arrangments were being made for Feldman, 19, to surrender next week on the no-bail warrant, the district attorney's office said.