Many would say the pro-Palestine movement is already filled to the brim with contradictions – but then steps forward an Austrian multi-millionaire heiress whose family made millions off the back of the Holocaust and who is now joining the latest “freedom flotilla” to Gaza.

“I decided to join the flotilla because I wanted to support the effort to end this genocide,” said Marlene Engelhorn, 33, in one Instagram post.

Engelhorn, who inherited some £21 million in 2022 is a descendant of Friedrich Engelhorn, who founded the chemical giant BASF. In the 1920s, BASF merged with another German company, IG Farben, which later supplied Zyklon B to the Nazis. This poisonous gas was used to kill an estimated one million people, most of them Jews, at Auschwitz and other death camps.