Let's say a Soviet exchange student back in the '70s would go back and tell the KGB about people and places and things that he'd seen and done and been involved with. This is not really espionage there's no betrayal of trust.
If the security forces continue to be dominated as they are now by political groups or sects then the people won't trust in them – and the result will be civil war or fragmentation of the country.
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A lie gets halfway around the world before the truth has a chance to get its pants on.