At most of the companies I've worked at it has been either a written or unwritten rule that politics is taboo.
You can have you own opinions and follow whichever party you want, CDU, FDP, SPD, Grüne, Linke AfD etc. But you don't discuss it at work it has nothing to do with your job, so keep it for your social circle.
Certainly all company communication tools are for business purposes only.
Biting the hand that feeds IT
