Is What's Wrong With the World Able to Save its Communities and Country?

Lydia McGrew's response to my comments at What's Wrong with the World that transnational adoptions would destroy American communities (I replaced "destroy" with "change" at her adamant protest) was that how can one single child, who is to be brought up with mother's apple pie, ever harm the community?

My concise answer is that if one family thought that it was OK to bring in a Korean child, why would other families not think that was a good idea? Just like pro-immigration groups, supporters of transnational adoptees think that there is nothing wrong with bringing in people who look very different from them into their communities.

McGrew elaborates further and says that these children are brought up to be Americans. But the reality which McGrew refused to acknowledge was that these kids who are brought up saying "Mommy" and "Daddy" later on, according to a New York Times report, psychologically abandoned these very American lifestyles and parents, and went to great lenghts to find their original countries, languages and cultures.

As I wrote in one of my comments:

No era has ever performed this experiment before. And this experiment is clearly full of holes. The NYT group showcases the adults of the first wave of that experiment. To me, it proves that the experiment has failed. Our ancestors knew better.

I instinctively understood this. Why couldn't McGrew?