“Do you know the name of the propaganda minister of England, or America, or even Stalin? No. But Joseph Goebbels? Everyone knows him.” The cynical, grinning Dr Goebbels (Robert Stadlober), perhaps the first master of fake news, is not short on confidence.

“It is so disgraceful, what happened there,” says Anita Lasker-Wallfisch, in a comment that is the understatement of the century. She is referring to the genocide perpetrated by the Nazis in concentration camps like Auschwitz-Birkenau, where she was held prisoner.

The German theologian, pastor and anti-Nazi dissident Dietrich Bonhoeffer (1906-1945) was a saintly, courageous figure, of major historical significance. Those are good reasons to ensure that his story gets told and becomes better known. At a time when fanatical violent nationalism is on the rise and religion has been commandeered to support it, Bonhoeffer's work and his contribution to ideas have a renewed relevance.

In a too brightly tiled Gentlemen’s public convenience (Nitin Parmar’s beautifully realised set is as much a character as any of the men we meet), a lad is shaving his head. He’s halfway to the skinhead look of the early Seventies, but he hasn’t quite nailed it – he's too young to know the detail.

If Mark Twain thought that a German joke was no laughing matter, what would he make of a German comedy? 

As last week’s news evidenced, genocide never really goes out of fashion. So it’s only right and proper that art continues to address the hideous concept and, while nothing, not even Primo Levi’s shattering If This Is a Man, can capture the scale of the depravity of the camps, it is important that the warning from history is regularly proclaimed anew – and heeded.

The day after I saw the show, as went about the mundanities of domestic life, I wondered how long it would take to come across a reference to 1984. My best bet was listening to an LBC phone-in concerning next week’s conference at Bletchley Park on Artificial Intelligence, but the advertising break intervened, so I switched to Times Radio.

The Diary of Anne Frank became a Broadway play and has formed the basis of a lengthy catalogue of films and TV series, but the name of Miep Gies is rather less well-known. Yet without Gies the Anne Frank story might never have reached the wider world, since it was she who helped the Frank family, along with four other Dutch Jews, to remain in hiding and evade capture by the Germans from July 1942 until their luck ran out in August 1944.

We’re reminded, in a grainy black and white video framing device, that, as late as the summer of 1941, the USA saw World War II as just another European war. As brilliantly illustrated in Phillip Roth’s The Plot Against America, not only was such indifference to the rise of fascism more widespread than feels comfortable to reflect upon, but so, too, was a sympathy extended to the Nazis in their psychotic mission to make Germany great again.

“Only by doing something mad can I hope to stay sane,” says Charlotte Salomon (voiced by Keira Knightley) to her lover, Alexander Nagler (Sam Claflin). “I feel it inside me, the same demon that’s haunted so many in my family.”