Deb - I'm really excited to see you posting more! You've made some great posts... and I think this is a topic we don't talk about very much, but should!
We're lucky. Our family rallied around us 100%. I don't know if it's because I'd always had a feeling I couldn't have children, so I'd always talked about adoption or because they just didn't see anything wrong with it. My immediate family would embrace a child of any race, I'm certain, but I have often wondered about some of our more extended family. Racial divides are fairly strong in the mid-south and there's a lot of prejudice to get over. I believe that with every generation that passes, we get further away from the animosity black people and white people feel toward each other in the midsouth. We, ourselves, battle whether or not we feel it's "fair" to adopt a black child, though I can tell you that my mind opens up to it more and more every day when I think about what we CAN provide vs. what we CAN'T. In the end, I know it's funny because God has a plan and He laughs at me for trying to control everything. What will be, will be.
I hope our son's birthmama, B, will respond too because I know she's heard the same thing we've heard many times when it comes to open adoption: "well, won't she want him back?!" Of course, B's heard "aren't they afraid you'll want him back?!" I know we both give the same reaction to that question. I think that is most people's "fear" though. Openness isn't the norm, either, as it relates to adoption in popular media and conversation. I think that's changing some, though, or maybe that's just my perception because of our situation and influences. I'm still baffled when I hear of someone who's adopted and is parenting a child who is fearful of a birthparent knowing where they live or something. I understand there may be very specific special circumstances where an adoptive family should fear for a child's safety (like a child being taken from a family because of severe abuse, etc) but otherwise....???? I just don't get it. Anyway, I think our families - those of the adoptive family's and those of the birth family's - think open adoption seems totally foreign at first. Even a few months in, some of our extended family and even close friends didn't quite get it. But chip away slowly... that's the best advice I can give. And if they weren't believers at the beginning, they will be once they see the amazing benefits to openness.
I do wonder how family opposition factors into expectant/birth parent choices (choosing adoption at all, choosing open vs. closed, opposition to staying in touch or level of involvement, etc.).