I'd be interested in the actual paper as well. They're methodology might provide a bit more insight than the article. Overall, I wouldn't be surprised. Most Christians don't have the best track record for being tolerant and it's difficult to be tolerant and have a strict moral code at once. Also, the civil rights movement only made the final progress 50 years ago so there are plenty of racists remaining from then.
On a side note I think this is good progress for fox news.
On a side note I think this is good progress for fox news.