Catholic News Agency:

The legalization of “gay marriage” in America, even on a civil level, is unjust to children and poses a threat to religious liberty, warned Bishop Salvatore J. Cordileone of Oakland, Calif.

“Marriage is the only institution we have that connects children to their mothers and fathers,” he said. “So really, the question is, do you support that institution?”

In a June interview with CNA, Bishop Cordileone, who leads the U.S. bishops’ Subcommittee for the Promotion and Defense of Marriage, explained that Church teaching against the redefinition of marriage on a civil level as well as a sacramental level is a matter of justice.

“Marriage is about fundamental justice for children,” he said. “Children do best with a mother and a father.”

... Based on sound social science, this [New Family Structures] study complements common sense and “demonstrates what we’ve always known,” Bishop Cordileone said. “Children do best with a mother and a father.”

The bishop explained that this issue is of crucial importance because “we cannot have two different definitions of marriage simultaneously in the country.”

“Only one definition of marriage can stand,” he said. “This is not expanding the right of marriage. It’s changing the definition, or taking away something is essential to marriage – that it’s the union of a man and a woman for the purpose of the binding of the two and the procreation and education of the next generation of offspring.”