Actually, though, I'll say why I think it is. Dr. Guy almost hit on it.
I believe that foreign born kids are, to these celebrities, the equivalent of exotic animals. Their mindset is "hey! Instead of buying the reticulated python this year, why don't we go buy a little (insert preferred ethnicity here) kid! The one Brangelina bought over last year was to DIE for!"
In a world where everything can be bought, people are just so much more property.
'course I'm prolly just being cynical.