Indeed fled from Germany, the Germans greatly assisted America in the establishment of a nuclear weapon, but it doesn't excuse the Russians stealing technology from the Americans. Why do you take offense at China? They are the same Communists like you and methods they are the same.
Your allegations are baseless, because there are hardly any similarities between the American and the Russian nuclear programs. And regarding China, they have established themselves as the masters of plagiarism.
I agree with you in relation to China, but in Russia I disagree with you. All technologies that are able to work Russian stole. There are many examples. It is not only nuclear technology, but also vehicles, weapons, etc.