MONDAY'S "Great American Boycott," which was timed to coincide with the traditional May Day communist celebration of the worker, has been compared to the nonviolent 1965 march for voting rights from Selma to Montgomery, Ala. Organizers even passed out copies of "We Shall Overcome" in Spanish. Don't buy it. ADVERTISEMENT The Selma-to-Montgomery march was about voting rights afforded to citizens under the Constitution; the May Day boycott was a demand for entitlements grounded only in the imaginations of the organizers. What happened at the Edmund Pettus Bridge outside Selma was a nonviolent demonstration to build sympathetic political support for legislation...