Putting aside any other issues alluded to or stated in re the whole Clinton-supporters-against-Obama issue, it strikes me that attacking someone for a name which implies a specific ethnicity or at the very least a specific language group is the very definition of racism, as D-Day says. Once you get down to “ZOMG Hussein”, there’s no more quibbling about various shades of racism, about theories or ideologies or dialectics - if you’re connecting two people based on a name with a non-Indo-European root, you are, in fact, engaging in racism.