Gerry Adams apologised for “silly and stupid” mistake on Twitter, but also said he had been “paralleling the experiences of the Irish, not just in recent times but through the penal days when the Irish were sold as slaves, through the Cromwellian period”. Photograph: The Irish Times

Senior members of Sinn Féin have in recent weeks continued to promote a discredited historical narrative which has also been used by white supremacist(...)