Aside from genuine outrage, conservatives and Republicans have a practical reason for wanting Trent Lott to step down - some of them are tired of been linked with racists. Given Andrew Sullivan's marathon week of outrage at Trent Lott, don't you think he should worry about being associated with an explicitly secessionist neoconfederate bigot who also writes for the Washington Times ? Email Andrew (andrew@andrewsullivan.com) and ask him if it doesn't reflect badly on him to work for such a newspaper. You can remind him that the newspaper previously had an editor with such views who was let go after being exposed by, of all people, Dinesh D'Souza.
Given that Andrew is currently expressing outrage at what is on the website of the Council of Conservative Citizens, maybe you can direct him to the website of the League of the South and, in particular, the writings of Robert Stacy McCain here and here.