A broadcast warning us not to mess with planet earth caught on shortwave

Transcript of the message:

Troublemaking
We live deep under
We live under you
Let's live together in perfect
One race, one (unintelligible)
We live underground
atmosphere
disturbing
...on your planet
For years...from your planet
Also: "Peace...We pray for peace"
Child (unintelligible)
Whistling
Singing?
Sound of wild birds