I've been wondering when this would turn up. Here's the "Obama Death List" (Not to be confused with the Clinton Body Count.)
It's easy to dismiss this stuff, but considering that a rather large number of Americans believe that Obama is a muslim because some bozo sent out an email, it's a mistake to think it doesn't matter.
These are themes that fuel the sick, dark underbelly of the American right wing. They don't mean all that much in and of themselves, but they do add to the overall themes of "otherness" that are used against Democrats. As Dave Niewert has amply documented, this is how they mainstream their gothic toxins into the body politic. It's par for the course, but disturbing, as always.