One accurate thing about the USSR in White Nights

I absolutely cannot agree with you! Probably you just watched the film superficially. Of course normally, american films dealing with the soviet regime and such carry anti-communist message. But this is the one that DOES NOT!!! You overslept the scene when Raymond is drunk and dances, and tells his story to Kolya, or what? Also, name one other film from that time which deals with the fate of an american defector. Rare. It was not a fashionable thing to talk about it as it was a shame to america. Yet this film depicts it. Now, what the hell are you talking about when you say anti-communist message???
The point of the film was that it did not support EITHER of the two systems: it depicted the problems of both regimes, the US indirectly through Raymond's story AND dissappointment, and the USSR directly.
You are a bit naive to think that after the iron-curtain collapsed racism suddenly out of nowhere just popped up its ugly head. Can you really imagine that? It was present. It wasn't government policy - of course not! Was it policy in the US? No. But was it present? Definitely - still is.
Also you contradict yourself: first you say that it's outrageous that after Raymond had defected from the US he goes back home, then you say: well, he was right to go after all... Congrats! Watch the film again more carefully this time, and you realize that Kolya gets to know that Chaiko wants to get rid of Raymond. Raymond was no idiot. He knew it that after he finished what Chaiko wanted him for, he would be got rid of again and this time probably for good. Chaiko says: It's better to grow old in a theatre than in a mine. From this it was evident, that he had no choice but to leave the country. And especially with the baby.
I don't know much about the treatment of US defectors by the USSR, but I watched a film about US defectors to the Peoples Republic of China. Some of them were treated very badly. Some found their ways, had family, learned the language, but most of them where very dissappointed. I don't think that it must have been much different in the USSR. Also in the film, Chaiko wanted to use Raymond as well as he could, when he couldn't, he got rid of him. So I don't think that US defectors had such wonderfull lives in the USSR after they left the spotlight - if they had ever been in it...
Also what's this huge love for the KGB? You worked for them or what? I live in an ex-communist country and I know how things were going, we had a kind of KGB as well, with a different name, but with the same funcion. Sometimes people just vanished, at other times they got back home after a few years suddenly, without any reason why they had dissapeared.
Kolya's situation: you didn't pay attention again. Chaiko wanted to use him too, that's why he didn't get to prison. But after the season opening of the theatre, he would have vanished into thin-air - in plain words, Chaiko would have sent him to prison. He just wanted him to take part in the opening, to show the world (both to Russians and to non-Communist countries) that here he is, our lost little lamb, finally he decided to come home (he could have proved like that that the US is not such a good country after all, the defectors come home after a while). After the fuss about him died down, Kolya would have gone to prison. He knew this from the beginning, that's why he wanted to get out of the country - he, as Raymond, had no other choice.
Okay, I hope you understand this film now better, and try not to cast stereotypes onto it.

I'm not going to discuss the political aspects of the film but the fact that Baryshnikov insisted the actors to speak Russian impressed me. It made the film more "believable" than the gibberish that Hollywood usually tries to pass off as Russian. Also one minutiae that impressed me is that Raymond & Darya's wedding bands were on their RIGHT hands, like they are in Russia.

While I'm sure the USSR's policy on immigrants dramatically improved after 1953, it's hard to ignore the fact that Stalin either imprisoned or executed almost every immigrant from the US after welcoming them with open arms. Of course Stalin imprisoned and executed 20 to 40 million of his own citizens, so I guess it says more about Stalin than the former Soviet Union. But I'd be curious to hear what life was like for an American who immigrated to the USSR during the 60s, 70s or 80s. Not for a military intelligence or political defector. Just a regular immigrant, like the character in the movie.