It's an interesting point regarding only having English as the language, but again you could apply this to Lufthansa or Iberia or any other European country, all of whom have different variations of their national language.
I am not in favour of discrimination, but I support the right of Swiss to choose the required language given the amount of time you will spend in Zurich around German-speaking people, and as flight crew you need to influence the dispatchers and ground handling agents, the truth is that you can function more effectively in German if you are based in Zurich.
It just seems that your definition of "discrimination" is a bit overdeveloped. Speaking as an Englishman, that's really saying something!
No hard feelings.