Christian pastor Caleb Kaltenbach was shocked Friday to see that a Costco in California had labeled Bibles as works of fiction.

"All the Bibles were labeled as fiction ... it seemed bizarre to me," Pastor Kaltenbach told Fox News. The pastor asked Costco employees why the Bible had been mislabeled, but they did not give an answer. Costco representatives later told Fox News that the labeling was a "human error at a warehouse."

"The idea that the Bible is inerrant and God's Word is not necessarily a mainstream belief anymore," says one student at Southwestern Baptist Theological Seminary. "Jesus is a real historical figure ... the disciples existed, His followers existed, and they wrote about Christ. It was cataloged in the Bible," he says - even if some disagree that the Bible is inerrant, as Christians uphold, they exercise poor judgment to dismiss the whole book as being a fictitious historical document.

Kaltenbach says he doubts that Costco would have labeled the Quran as "fiction," since our nation seems to be "living in an era of tolerance."

The incident is yet another eye-opener of how Christianity has become a minority belief in this country. "On the one hand, Christians should not yell out, 'persecution,'" Kaltenbach said - "But on the other hand, I believe that we do need to stand up for our faith, and we need to be vocal about our concerns."