That's not an exception. Birthers should be dissed in a rational book.
This isn't about ideology. Birtherism is a question of facts. You don't get to make up your own facts, regardless of your ideology. Birthers are just factually wrong.
Yes, they were wrong just like those people who claimed Flight 800 was shot down by missiles. How dare they? The government told us what we were supposed to think about both of these incidents.