BERKELEY, Calif. - At the birthplace of the free speech movement, campus radicals have a new target: the faculty that came of age in the 60's. They say their professors have been preaching multiculturalism and diversity while creating a political monoculture on campus. Conservatism is becoming more visible at the University of California here, where students put out a feisty magazine called The California Patriot and have made the Berkeley Republicans one of the largest groups on campus. But here, as at schools nationwide, the professors seem to be moving in the other direction, as evidenced by their campaign contributions...