There is a radical right that hates Obama as much as the radical left hated Bush Jr. In both cases there was an intense hope that something would happen and the office of the President would be opened to a 'legitimate' person.
The difference is that the radical left are mostly anti-gun, anti-violence and anti-military, the best they could do was hope that Bush would choke on a pretzel. The radical right has no such problems, and a lot of fascist fantasies, many would applaud a violent military takeover of the US.
Jay