As further proof that the lib contingent is not "partisan" by the strictest (i.e., dictionary) definition of the word, I'd say
booing Bush as he laid a wreath at MLK's grave is a pretty classless* move. A special award for irony deficiency to the protestor who carried a sign reading "'It's not a photo-op George.'" Criticize the photo op by doing something other than picketing, assjack; a cemetary is also not a protest site.
*I defer to the FB definition of classless.