Apparently members have stronger restrictions than those applied to persons who express extreme right views:
"Scientologists in Germany face specific political and economic restrictions. They are barred from membership in some major political parties, and businesses and other employers use so-called "sect filters" to expose a prospective business partner's or employee's association with the organization."
https://en.wikipedia.org/wiki/Scientology_in_Germany
I am just trying to check who are the committees who define what is an acceptable religion, how and under what legal framework.