What do we do with them?

I have to say that I found it really surprising when I read in Takaki that the Vietnamese were forced to come to the US as a result of the Vietnam War.  Of course we were among the nations opposed to the communist regime, but there were other nations who fighting for the Southern Vietnamese too!  I assume it was no great secret to the rest of the world that America was not the greatest welcomer of ethnic groups, who determined we were the best choice in the evacuation?  Other countries fighting against the communists included Australia and South Korea, were they not closer in location and in ethnic acceptance?  Perhaps America was the one able to provide the resources for evacuation, but I wonder if taking them all the way back to the United States was in their best interest, considering they did not even want to be there.  Dropping scared, homeless people into a knowingly hostile culture hardly seems like the best solution for the Vietnamese.  What would be really interesting is to find out if the second generation Vietnamese living in America assimilated into the new culture or held that same yearning to return home...