This is a lie. Varoufakis was not denied entrance in the country. The only official reports or statements to be found are that he was supposed to give a speech at the so called "Palästina Kongress" in Berlin. Although it was expected that speakers or participants will break German law by making anti-semite statements and other statements or forms of expression that are not protected as freedom of speech or freedom of expression by the Grundgesetz, the events was given permission to take place. UNDER RESTRICTIONS. The conference was called of shortly after it began by the Berlin authorities because of incidents happened I as mentioned above. In particular, there was supposed to be a speech via internet by a person who is banned from participating in political activities in Germany because of misconduct in the past. The permission for this de facto demonstration was revoked. It is unclear if Varoufakis was banned from engaging politically in Germany as a preemptive move by the German Ministry of the Interior or by Berlin authorities. Such move happens when it is expected that political actions taking place on German soil by a foreign person or foreign entity are not in line with German laws, especially the Grundgesetz. Since Varoufakis is no stranger to controversy and has a very special attitude towards Germany to put it mildly, such move may very well happened. And from my perspective, my country has every right to act this way and enforce our laws.
Democracy is not dying in Germany. In fact it is very well alive. If an event is called of that is clearly anti-semite and calls for the eradication of the state of Israel and is therefore breaking German laws, laws that were created for the most obvious reasons, it supposed to be a sign for a failing democracy, the dozens of pro Palestine demonstrations and events taking place in Berlin every week, protected by the German police tell a different story.
The lesson, don't go to a foreign country to break the laws of this country and you will be absolutely fine. Freedom of speech, of expression and freedom of congregation are not absolute. Never were, never will be. And for good reason.