BOSTON - Delegates arriving for the Democratic National Convention were greeted Sunday by competing protests against the war in Iraq (news - web sites) and abortion. About 2,000 protesters gathered at noon on the historic Boston Common, site of many of the city's most memorable demonstrations. After about two hours there, they marched half a mile to the FleetCenter, where Democrats plan to nominate hometown candidate John Kerry (news - web sites) for president on Wednesday. "This is just the beginning of a week of protests," said Larry Holmes, spokesman for Act Now to Stop War and End Racism, a...