The British Association for Adoption and Fostering has come under fire for describing people who object to gay couples adopting as "retarded homophobes".
The Daily Mail has attacked the BAAF for being "adoption Nazis".
The "retarded homophobes" phrase was used in a pamphlet for potential gay and lesbian adoptive parents and also on the Bemyparent.org.uk website, although the word "retarded" has now been removed from the site.
Religious groups and disability campaigners have reacted angrily to the statement, calling it offensive.
Would-be gay adopters were told: "Most importantly, don't worry about society.
"Children need good parents much more than retarded homophobes need an excuse to whinge, so don't let your worries about society's reaction hinder your desire and ability to give a child a loving caring home."