We're at a historical juncture: A growing number of people are declaring what has been achieved over the past decades in Europe to be wrong. They want to return to the nation-state. Sometimes there is even a blood and soil rhetoric that for me is starkly reminiscent of the interwar years of the past century, whose demons we are still all too familiar with.

The vast majority of people support the idea of an enlightened, modern union of countries demonstrating solidarity. Film director Wim Wenders recently summed up the problem to me very well. He said the idea of Europe has become an administration, and now people think that the administration is the idea. But that doesn't mean we should give up on the idea - it means we should change the administration.

You can be sure that I won't experiment with right-wing terms.

I find it surprising, however, that many German politicians generally oppose referendums, but then when it's an EU matter, they immediately scream for a plebiscite.

The old fundamental principles must continue to apply, even in our changing society: Democracy knows neither master nor slave. Equal education opportunities for all, no matter where they come from and no matter who their parents are. Equal access as well when it comes to digitalization.

It is impossible to swear an oath to the German Basic Law without realizing that our constitution is among the most liberal constitutions in the world. As the head of government in such a country, I would stand up to all those who call into question this free, open and tolerant model of society.

You can't always be demanding solidarity from others and then refuse to show it yourself.