An eye for an eye isn’t really relevant. If a country is manipulating its markets, and denying another country access to them, then the country that is denied fair access is putting its own economy at risk. A US business cannot be expected to fairly compete with a Chinese business, and trade barriers are a perfectly reasonable response to that.

Regarding the US intelligence apparatus. It’s a threat to the liberty of US citizens. But it’s not a threat to US national security.