Israeli-Arab watchers, take note: The Israeli-Arab sector was on strike today, in solidarity with a similar decision made by the Palestinian Authority. The Northern Police District went on alert for possible rioting. The Israeli-Arab leadership said that at issue was what it called the \"massacre by Ariel Sharon of Palestinians.\" Yesterday, a large nationalistic march was held in the Arab town of Sakhnin in the Galilee, where many thousands of Arabs held up pictures of Arafat and sang the Song of Shahids [Martyrs]. Arafat\'s voice was heard live over the loudspeakers, and the mobs responded, \"Millions of shahids to Jerusalem!\"