If there ever was a time for a cool, rational and unemotional series of responses on the part of people in Europe, it is now. One reason is that Russia's President Vladimir Putin and Trump are very similar: They are macho types, they are bullies - and they want the same thing: to weaken the EU, albeit for different reasons. Trump, for his part, is a protectionist of the first order, and he wants to make his vision work. He shows no interest in competition with others, but aims to go back to the 1930s.

The pacifist streak in German politics is a problem. But Greens and Social Democrats have to ask themselves: In an imperfect world, what do they prefer? The rise of the right or the success of the European project?

I do not think the British want to become America's "Airstrip One," as the British Isles are called in George Orwell's "1984." The EU's internal market was a massive success even before the UK joined it, and it joined because there was no real alternative. So while British tabloids are expecting to be punished by Germany, Brexit is punishment in itself.

German dominance in the EU is a fact of life. But for historical reasons, it would be the last country to be swept away by a populist wave. And one thing is certain: If Germany goes down, Europe goes down, and with it all the values which we thought are worth living for. Germany has to be the champion of these values.

We are in an extremely dangerous situation. It was ignorant and ahistorical for Donald Trump to say that the EU will dissolve. He is a man of very little historical understanding. For example, when he accused his own intelligence community of using Nazi tactics against him, he was actually confusing the Nazis with East Germany's secret police, the Stasi. Trump also has no idea that for 70 years, it has been U.S. policy to support those who want to unite Europe. It is very dangerous that he is turning his back on Europe now.

You won't find anyone in the UK who doesn't admire what Germany has become. The bilateral relationship between London and Berlin will become more important in the future, and the UK government wants Germany to grow stronger - for Europe's sake. It is in Britain's national interest that the EU succeeds, and Prime Minster Theresa May knows this.

If there ever was a time for a cool, rational and unemotional series of responses on the part of people in Europe, it is now. One reason is that Russia's President Vladimir Putin and Trump are very similar: They are macho types, they are bullies - and they want the same thing: to weaken the EU, albeit for different reasons. Trump, for his part, is a protectionist of the first order, and he wants to make his vision work. He shows no interest in competition with others, but aims to go back to the 1930s.