The relations between Berlin and Ankara became tense after German-Turkish journalist Deniz Yucel was arrested in Istanbul in February over alleged links to a terrorist organization and terrorist propaganda.
Speaking at a rally in the Turkish city of Eskisehir on Friday, Erdoğan told his compatriots living in Europe that they should view success - and the creation of big families - as the best way to combat the swell in anti-Muslim and anti-Turkish sentiment across the continent. The spokesperson also said that "Turkophobia is on the rise in Europe". The Turkish strongman over the weekend escalated his war of words against Europe and especially Germany, his country's most important ally.
Erdogan has previously said that both the German and Dutch governments egaged in "Nazi practices" after each country prevented Turkish ministers from campaigning at events for expatriate voters ahead of an April referendum in Turkey that would expand Erdogan's power.
"The comparisons between the Federal Republic of Germany and National Socialism. are not only insulting and absolutely wrong, they also diminish the reign of terror of the Nazis", he said in a statement.
"Against who? My Turkish brother citizens in Germany and brother ministers" who went to the country to hold campaign rallies for a "yes" vote in next month's referendum.
Reiner Haseloff, another member of Merkel's CDU and premier of Saxony-Anhalt state, urged Berlin to bar such visits. "We are afraid that Germany may fall into the same trap again", Kurtulmus said at a press conference in Ankara.
In his speech on Tuesday, Erdogan said Turkey could no longer be pressured by considerations such as a $6 billion migrant deal under which it agreed to stop illegal migrants from crossing into Greece in exchange for financial aid and accelerated European Union membership talks.
Johannes Hahn, the European commissioner for neighborhood policy and enlargement negotiations, said the prospect of Turkey joining the EU is becoming "more and more unrealistic". "They make a reasonable dialogue impossible", he said.