Turkish leader Erdogan has accused the EU of acting like Nazis
The comments prompted a furious response from German officials, including allies of Chancellor Angela Merkel, who declared “enough was enough.”
The war of words came as Mr Erdogan warned it was considering a change in its relations with Europe following a referendum on presidential powers next month.
He said the country’s intention to join the bloc was being used as a threat against it by Brussels mandarins and blasted the refusal of European Union states to allow Turkish political rallies.
Turkish leader Recep Tayyip Erdogan
Merkel, now you're applying Nazi methods
Mr Erdogan said: “Merkel, now you're applying Nazi methods. Against my brothers who live in Germany, and against my ministers and lawmakers who visit there."
The leader, who has been criticised for a ferocious crack-down on freedom of speech and human rights since a bloody but unsuccessful coup attempt last summer, said Berlin was “fascist and cruel”.
This provoked an angry response from Angela Merkel’s administration, who said Mr Erdogan had crossed a line.
Volker Bouffier, vice chairman of Mrs Merkel's Christian Democratic Union (CDU) party, appeared to rule out a visit to Germany from Mr Erdogan, which is expected to take place next month.
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He said: “Enough is enough. Mr Erdogan and his government are not welcome in our country and that must be now be understood.
"Someone who insults us in this way cannot expect that we will assemble thousands of police to protect him.”
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Reiner Haseloff, another member of Merkel's CDU and premier of Saxony-Anhalt state, also criticised Mr Erdogan.
He said: “Those who compare us to Nazis are not welcome. That is not acceptable.”
Erdogan accused Angela Merkel of using "Nazi methods"
EU Commission Vice President Frans Timmermans has also criticised the Nazi comments, which were also made against his homeland of the Netherlands.
He said: “President Erdogan's comments about Germany and the Netherlands are not allowed. We don't want to be compared to Nazis.”