DNA tests contradict Mormon scripture. The church says the studies are being twisted to attack its beliefs. From the time he was a child in Peru, the Mormon Church instilled in Jose A. Loayza the conviction that he and millions of other Native Americans were descended from a lost tribe of Israel that reached the New World more than 2,000 years ago. "We were taught all the blessings of that Hebrew lineage belonged to us and that we were special people," said Loayza, now a Salt Lake City attorney. "It not only made me feel special, but it gave me...