I can't speak for Bobert, but I also live in Bubbaland, albeit a different part, and I think I know what he's talking about when he says its denizens "threaten to kill Obama". It's not direct threats as in "I'm planning to kill..." or "I will kill..." but more "I'd like to kill..." or "I wish somebody'd kill...". Technically, I guess such statements aren't threats in the legal sense, but the underlying current of of anger and intolerance is there just the same.