Americans who say they have gay or lesbian friends are twice as likely to agree gay marriage should be legal.
Fewer than half of Americans say homosexuality is sinful.
And evangelicals are increasingly at odds with American culture over same-sex relationships.
Those are among the findings of a phone survey of 2,000 Americans about gay marriage from Nashville-based Lifeway Research. Researchers found that friendship and faith play an influential role in how Americans view gay marriage.