I am truly sorry that the outcome is not what was desired. Sometimes people need time to adjust to changes. Especially if those changes go against something they believe in or if it is something they do not understand. While you all are happy, the world may not be. As we know, society is not exactly one for embracing anything outside of the norm. Give it some time and try not to let it get you down.
Sidenote: are any of you trying to keep them away from the grandchildren that are already here? They may not like your decisions, but they do love those children. Depending upon how old they are, removing the grandparents from the picture might hurt them. Just something else to think about.
I hope it works out for you.