Yes I know about it. Allies have always engaged in snooping and peripheral intelligence operations against each other. As long as it doesn’t go after vital national interests, or involve really nasty stuff like killings and such, it’s just part of the rough and tumble of international affairs. You have to look at the full picture, not get hung up over single incidents.

Note German intelligence wasn’t so much complaining that the Americans did it, as much as that they weren’t allowed to do it back.