What's with the McCain People

I didn't really like any candidate this  election.  I bashed on Obama, more the status bestowed by the media, extensively.  I don't have as much to say about McCain.  Since he was behind most of the way, it's hard for the media worship to get to me.  Why do people boo the announcement?  Did the Kerry people boo in 2004?  Do these people not understand how Bush screwed things up so that McCain didn't have a chance?