And you'd make that decision based on the interest of your country. My decision as a citizen of this country would be to cut off all funds to any country that steals my countries secrets and puts its citizens in harms way. I would also let it be known that any spy caught in my country would be terminated. Immediately.
Hmmm. Did you know that the UK and the USA have a spying agreement? The UK spys on domestic Americans - the CIA spys on Brits. Seems both organizations are forbidden to spy on their own citizens and get around it in that way.
Likewise the US and the Israel. My understanding is that we get a lot of information out of Israeli Intelligence. It would shock my friends to hear me say it, but in espionage, it is awfully hard to find "black and white."
That said, I'd shoot traitors like Pollard, too. Makes a good example.