Senior German conservative politician Andreas Scheuer has said German must become the language of the country's mosques and that foreign funding from Turkey and Saudi Arabia must stop.
The general secretary of the CSU, sister party of Chancellor Angela Merkel's CDU, said political Islam was undermining integration.
His remarks came amid a German freedom-of-speech row involving Turkey.
The Turkish president has filed a legal complaint against a German satirist.
President Recep Tayyip Erdogan was angered by an obscene poem read out by Jan Boehmermann on public broadcaster ZDF.
The comedian explained that what he was saying broke German laws on free speech before going on to accuse the Turkish leader of having sex with goats and sheep. [BBC] Read more
