This is not uncommon between even allies: https://www.dw.com/en/german-intelligence-spied-on-white-hou...

The issue has less to do with intelligence silliness, and more to do with the fact that the overall geopolitical objectives of the US can not be trusted, and that rift has grown to a point where self-reliance on critical infrastructure may be in Europe’s best interest.

That's a small blip on the timeline. If you want some serious, long running stuff, you should read Crypto AG scandal.

>Crypto AG

The cracked encryption was not given to "friends" but country's like Libya

> not given to "friends"...

US started to eavesdrop on Turkey and Greece first. Germany pulled out of the project by citing this is going too far for them. Some citations from news:

The Germans were taken aback by the Americans’ willingness to spy on all but their closest allies, with targets including NATO members Spain, Greece, Turkey and Italy [0].

Operation Rubicon [1] has a map of spied countries, incl. NATO allies and "friends".

I failed to find that great long-read article. If I can find, I will attach it here, too.

[0]: https://www.washingtonpost.com/graphics/2020/world/national-...

[1]: https://en.wikipedia.org/wiki/Operation_Rubicon