Many people watching Jeremy Corbyn’s interview on Marr last Sunday will have been shocked by his remarks about the need to begin a ‘dialogue’ with the leadership of the Islamic State. ‘I think there has to be some understanding of where their strong points are,’ he said.

Afterwards, when these comments were widely reported, Corbyn’s supporters said they’d been taken out of context — the standard defence whenever he is criticised for saying something positive about Islamist terrorists, such as describing Hamas and Hezbollah as his ‘friends’ or the death of bin Laden as a ‘tragedy’.