Vanessa Alikhan was at a Democratic ''unity party'' when she overheard another guest indignantly refute the rumor that Barack Obama is Muslim, as if it was a racial slur. She later recounted the conversation to a friend. ''She told me that this is politics and that I should just deal with it,'' said Alikhan, a Fort Lauderdale graphic artist who converted to Islam about five years ago. ``To me this is the same as telling an African American or a Jewish person they should deal with discrimination because people aren't ready to embrace them as a group.'' She and other...