Have you already forgot the Merkel Phone incident?
https://www.reuters.com/article/world/us-spy-agency-tapped-g...
Trusting the US should be considered a problem since decades.
That's a small blip on the timeline. If you want some serious, long running stuff, you should read Crypto AG scandal.
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.