First of all, if you want to read some books about the perspective of transracial adoptees check out: Inside Transracial Adoption and In Their Own Voices. You don't know any trans-cultural adoptees that felt it was a good thing? I know several. An adult adoptee from Korea was the first person to suggest to us that we consider international adoption.
But to answer your other questions:
1) My children were living in an orphanage in a developing country embroiled in a civil war for almost their entire lives. Their biological family made the decision for them to be adopted by Americans. We spoke to them. Their traditional culture had been entirely replaced by a culture of war, rape, brutality, starvation and disease. My children still have nightmares about it. We didn't change their religion.
2) We did not change their names, just tacked on our family surname. And since we live in a very diverse area, I'm not sure what you mean by "white lives". Sounds like a very baited statement. I imagine I'm supposed to say that by providing adequate food, shelter, love, education and healthcare that I am providing a "white life" so that you can come back and call me a racist. But I'm not taking the bait. Sorry.
3) Do I think it's better for them? Absolutely. No doubt. And so did their biological family and their country of birth. It's pretty ethnocentric to assume that the governments of other countries and their families aren't able to decide if adoption is the best thing in a terrible situation.
4) Do I take them to interact regularly with their people? I keep the door open to making return visits. But because of the trauma they endured while living in a culture of civil war, they are very fearful about going back. In small doses, they are willing to interact with immigrants from their home country and continent, but at times even that is fearful for them.
5) We had the same religion. But if there was a difference, we would have supported it. In fact, we had resources already lined up to help us.
ETA: Walter, thank you for proving my point. Because according to you, parents of children aren't capable of deciding whether or not adoption is in their children's best interests. No, they need spoiled kids like you, who have never gone a hungry day in their lives, to tell them what they should be doing.
Until you've lived in those conditions, you have zero ground to stand on.