[IvyMike]

It is terrible that someone did this. Nobody should have to put up with that bullshit.

I do not know anything about German law. But for reference, if this had happened in the US, I would recommend that you contact an employment law attorney, because as you described it you might have a basis for a lawsuit. (Only a lawyer could tell you for sure.)

[Jach]

What would one hope to gain from such a lawsuit?

[IvyMike]

Compliance with Title VII of the Civil Rights Act. In the US, they would be breaking the law, and that's how these things get enforced.

[ANTSANTS]

Great stonking wads of cash?