I well know a lovely young man who is married to a young woman at my temple. He is an agnostic, and was raised by two same-sex parents. And for someone who is now in his late 20's, married with a fairly good job, I have to say he is one of the few success children out there.
So I really do not think same-sex families can be harmful to children, especially when same-sex marriage in Canada already exists for a few years now. God loves all Eir children, even the ones that decide to love a spouse of the same-sex and fulfill family responsibilities in raising children. There's too much hate, violence, crime and other horrible things done to children; having them loved and raised in a home with loving parents is nothing more than Heaven's blessing.