If you where Stalin, would you have accepted the change? A westerner would have probably made himself very ill if in that situation (well I would), your son or your country???

But stalin was an Evil B******, so it's no suprise he didn't want his son back.
If it was Churchill's son, an SAS team would probably be sent in. It would also be good practice for years to come...

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Patriotism is where the love of your country comes first, nationalism is where the hate of other countries comes first.-Charles De Gaulle.