As both an American (culturally) and European (by citizenship, as in European Union citizen), this whole ordeal is going to be profoundly damaging to US-EU rela

As both an American (culturally) and European (by citizenship, as in European Union citizen), this whole ordeal is going to be profoundly damaging to US-EU relations. But, you (Americans) should be angry because democracy has been in backslide hardcore in the US. Europe has dealt with populism before, unlike the US, and is more likely to recover from these bad times than the US—and it is really due to a multitude of reasons. My bet is that the US closed the operation once they knew they were certainly busted. Who knows, maybe even a European counter-operation of some sort occurred. The US probably has several other covert operations now based directly on intelligence from the devices with poor encryption. Sure, post World War 2, the US maybe had legitimate reasons to be spying on such activities in general in Europe. They also probably knew (practically guaranteed) over time from various patterns (from good data—whatever that data could possibly be) that a super coordinated secret intelligence operation was going on between European countries, while not knowing who exactly they were (as in not being able to put their finger on what was going on, but still being able to rely on intuition to just know and to justify the means). Swiss laws permitting ultra-confidentiality in banking do absolutely have a legitimate purpose, but they are problemsome too. Unless you have been living under a rock in recent years, everybody knows that there are plenty of oligarchs (Russian oligarchs in particular) funneling dirty money through the Swiss banking system. America also effectively has its own form of oligarchy too (by the way, guess who is listed top in the world for wealth inequality by Credit Suisse? Russia. Guess who is second? USA.), so it is not like this route seemed unnatural. Even if the Europeans knew for certain that somebody had some sort of substantial counterintelligence on them, it would still take a long time to figure out the source of failure. That is, unless the US messed up severely, which, I suspect, is probably what happened.