>>10337
Here you go(I hope you speak German),
https://www.ekd.de/kirchenfinanzen/kirchensteuer/steuerbefreiungen.html
This is the official webpage of the Lutheran Church of Germany that mentions their tax benefits because of their status as public corporation and a lot of communities including non-Catholic/Lutheran ones like Orthodox Christians, Jews, Mennonites, Evangelicals, but also one Muslim communitiy and even a few humanist associations enjoy the same privileges.
They get tax breaks and can collect church taxes(though a lot of them haven't made use of this right so far for example the Muslims and the humanists).
First Muslim community recognized as a church(in the judicial sense): http://spiegel.de/politik/deutschland/a-905593.html
There is a list of all recognized public corporations in the German wikipedia article.
But for more information on the finances of the churches in Germany, I recommend reading 'Violettbuch der Kirchenfinanzen' by Carsten Frerk.
Now concerning, OP's question the German state should remove all privileges for religious communities including the small and the big cults.