Under state and federal regulations citizens have the right to religious freedom. Parents placing their children up for adoption have the right to choose placement of their children in a home which shares their religious beliefs, ensuring that the child will be raised in their faith. The government has no right to make that choice for them, or force adoption agencies to make placements in unacceptable homes.
Parents forced by circumstance to place their child up for adoption have the right to choose a real family, consisting of a mother and father who will raise that child in the fear and admonition of the Lord. That is part of their freedom of religion. Any contrary restrictions are not supported by our laws, but are manipulations of groups pushing their own personal agendas, not those of the majority of citizens.