Crazy people are often highly intelligent. One can be extremely intelligent yet maintain some extremely odd views. You have to separate basic intelligence (e.g., the IQ one possesses) from opinions and beliefs that are based on matters outside of measurable science (e.g., religious views).
Ted Bundy possessed an intelligence that was extremely high, yet he was a serial killer.
Marilyn vos Savant possesses what's been called the highest IQ, but does that mean she'd be a good president? Furthermore, having read some of her articles I don't think she's necessarily playing with a 52 card deck.
I'll say that people like Rick Santorum and Mike Huckabee are also highly intelligent, even though they maintain views and opinions that don't seem to be born out of logical reasoning. Newt Gingrich was one of the smartest men in Congress, but I wouldn't trust him delivering newspapers. There are people I know who I'm certain have IQs in the superior range, but have ideas and views that just make you scratch your head. Some of whom honestly believe in the "young earth" view. That doesn't take away, however, from their basic 'intelligence' (or their ability to perform at a superior level on standardized measures of 'intelligence').