Iran #1?
Was it even legal for us to be all spying on Iran n' stuff? If they were doing it to us wouldn't we use it as an excuse to bomb them or something?
Anyway, good for Iran!
Spying is usually considered unequivocally illegal, and spys are incarcerated during peace and shot during war.
Surveillance on the other hand, although usually confused by civilians as a synonym for spying, is a different thing. What we usually call spy planes (U-2) or spy ships (the USS Pueblo) or spy satellites are actually surveillance platforms. One difference is that a spy is disguised - out of uniform - pretending to be someone else, a journalist perhaps. Whereas a surveillance platform is not secret, and usually well known by country of origin. Our Intelligence satellites fly over other countries - and theirs (Chinese, Russian, etc.) fly over us. It's actually good to know what each other has. No mistakes then.
And that's the real difference here. In the West, nuclear facilities are open to international inspection. In the bandit countries - Iran, North Korea, etc. - it's all secretive, hidden, paranoid and underground.
When I was a boy, Russian Tupalovs flew down the east coast of Canada and the United States, taking pictures and listening in on our telecommunications - unmolested by the USAF. And (KGB) Russian "fishing" trawlers sailed just outside what was then the Three Mile Limit. In fact, when they used to show the Gemini and Apollo launches from the Kennedy Space Center in Florida, several Russian trawlers were always there monitoring telemetry.
If the Iranians spy on us, their spys might be arrested. But if they surveille us - say with a satellite, they are free to do so.