"Nazi comparisons are unacceptable in any form," a German government spokeswoman said, adding that it was up to Turkey to tone down its rhetoric and avert damage to relations between the two countries, Reuters reported.
Erdogan said in a speech in Istanbul on Sunday: "Merkel, now you're applying Nazi methods. Against my brothers who live in Germany, and against my ministers and lawmakers who visit there. Would this suit the ethics of politics? Your mission is not to support terrorist organizations, but to extradite them."
Erdogan has also accused Germany of “Nazi practices” for blocking his ministers from speaking to Turkish voters resident in Germany.
Germany is home to the largest Turkish diaspora in the world, many of whom are of Kurdish origin.