Poll: 23 Percent of Texans Believe Obama Is a Muslim

I'm wondering how this could be.

My guesses:
1. 23% of Texans lived in their mother's basement with no access to the outside world until they were contacted miraculously by the people who conducted this poll.
2. 23% of Texans can't read or understand English.
3. 23% of Texans rank lower in IQ than their former Governor.