I don't think his feelings are all that surprising. They decided they wanted a child that was genetically theirs, so went to the expense and trouble to find a surrogate that could achieve that (regardless of whether you agree with surrogacy, and I don't, that's the process). To then find that the child is genetically not yours, will be devastating. You haven't got what you signed up for.
Those parents will forever be questioned over the difference in race between the baby and the parents. People may assume they adopted, or that the wife had an affair. If they had adopted, or the wife had an affair, that's life. But they wanted a baby that was theirs, that was like them, that people would assume came about because they had sex one day and sperm + egg = baby.
I couldn't give up a child that I brought in to the world, whatever the circumstances (and I say that as the mother of 3 children, 2 with SN, and declined triple test/nuchal fold, etc., because I wouldn't have an amnio if the results came back high risk). But I can understand the devastation of not getting what you thought you were getting, and this couple went through a process to get what they wanted.