Why is religion benefitial to the american democracy?

As Tocqueville writes, "Freedom sees religion as the companion of its struggles and triumphs, the cradle of its infancy, the companion of its struggles and triumphs, the cradle of its infancy, and the divine source of its rights. Religion is considered the guardian of mores, and mores are regarded as the guarantee of the laws and pledge for the maintenance of freedom itself." Tocqueville speaks at length about this idea in Chapter 9, Volume 1.