They wanted to build a new mosque in Munich. An alegedly friendly, open and German speaking mosque. Initially it was approved. But when the authorities found out that the leader Benjamin Idriz had realtions to militant organizations "Milli Görüş" and "Islamische Gemeinschft Deutschland", the approval for the mosque was cancelled.
He was also engaged with Ibrahim al-Zayat, a virulently antisemitic islamist.
They announced to fight until the Federal Constitutional Court to get that mosque built. Their chances are seen as about 0% to get that mosque built, since the Contitution Protection Agency has registered the activists as enemies of the constitution. So they won't have any chances.
This is another proof of how taqiyya works: In the beginning they pretend to be your friends and want to make everything as a friendly gesture. Then they get mad if things do not work as they want to. And I am sure that a German speaking mosque is just planned to attract native population to convert them to Islam.
http://www.islamisation.fr/f-allemagne/