As perfect conditions secert service hire abused people because they are good for working on secret service like cia mi6 FSB mosssad and all.
Hitler was one of them who got abused and used Young age off course secret service knew that and he was perfect asset.
The kim jon un another perfect example of this , but what is common with all of them is that once they get in power they use their whole power and country to revenge the pain and hatred what is inside them.
They will make whole country and nation as whole them gigant version of them.