One more time, for possible penetration into your brain: they are not transplants. They are the grandchildren of those who were forcibly relocated there. It's not even the sins of the fathers being visited onto the sons. It's a matter of the sin's of people who hated the fathers being visited on the sons.
Meanwhile, of course, the Latvian government sponsors parades for Latvian veterans of the SS. Those are your kind of "good citizens," I guess.
Not every nation is required to extend citizenship to everyone born there. No nation can be expected to automatically naturalize aliens transplanted to their territory or born there during a period of occupation. It's ridiculous on the face of it.