There is a lot wrong with the birthers, and all I can say about them as a whole is that, in the future, “Birthers” will be just an interesting sidebar in a history textbook (or the e-edition of the textbook).
But more can be said about the birthers’ argument. This gets a little meta-
Forget about the politics. Forget about psychological theories behind the birthers’ “movement”. Look at the logic. Listen to what they’re actually saying. In short, consider the argument. Of course, birthers are crazy. They are uneducated; they don’t understand what words like counterfactual, ad-libbing, paraphrasing mean. They are jerks, bullies, inconsiderate… They are so stupid that they don’t even know you are mocking them for their utter stupidity! So they aren’t fun to argue with, and aren’t worth arguing with. But - and this is where it gets meta- - their arguments are worth arguing about. Birthers don’t understand concepts like counterfactual; however, if you could, as it were, argue the argument, birthers and non-birthers would reach the same conclusion.
Indeed, this argument, followed through, leads to the conclusion that:
The President of the United States was born in the United States.