The Democratic National Convention's Aug. 24 interfaith service in Denver is supposed to be about unity. But to a Washington, D.C., coalition that supports nontheistic views, it's about division. The Secular Coalition Group, a lobbying organization for church-and-state separation, is pushing to get an atheist on the speaker list, and contends the service is divisive because it alienates nonreligious Democrats at a time when the party needs to unite to support the presumptive nominee, Sen. Barack Obama. "We can all hold different beliefs," said the group's executive director, Lori Lipman Brown, "but we can still come together as patriotic Americans."...