I think you just answered your own question.
Stille Nacht! Heilige Nacht! Alles schlaft, einsam wacht! Nur das traute heilige Paar, Holder Knab im lockigten Haar!
Schlafe in himmlischer Ruh!!!
What is it about German?..it always sounds pissed off...
Not really...here’s a link to the best radio station in Germany (Bayern).
http://www.antenne.de/antenne/home/home/index2.php
Click on the “Radio Hoeren” button located to the right upper screen, otherwise click on this link
http://webradio.antenne.de/internet-radio/antenne/meinradio/im-internet/01249.html
This generation of Germans has a right to be (very) pissed off--at being expected to carry all the lazy arses in the rest of Europe...
In reality, angry musik videos (or old war movies) are a poor way to judge the harshness of a language.
The more you know German (and I know a little) the smoother and less angry it sounds.