I interpreted the issue with some of the Swiss in power, as fear of Muslimization. Big question is would they see several Buddhist temples in their country as a threat to their political security or societal values? Despite their avowed freedom of religion.
Perhaps alpinerabbit TE member can comment since she lives in Switzerland.
I hope things have changed in Switzerland in past 20 years. I heard slightly differently from a Canadian woman who lived and worked there for 7 years. She worked for the Canadian embassy. She did have a finely tuned sense of 'social justice' and could sense inequities in certain social situations if such situations arose.
She was/still is fluent in German (and French) since that is her mother tongue. Hence socialized with locals there, got to know some interesting stuff. Some of it was not pleasant....there is an underlying paranoia by some Swiss who have been there for generations..of 'foreigners' or recent immigrants. Things would be different or tolerated, I suppose if one has a healthy amount of money or more "Westernized".
Let's hope that the official desired ban on minarets represents a few folks there, not all.