Diaby, of the Social Democrats (SPD), entered parliament alongside Charles M Huber, who sat for the Christian Democrats for just one parliamentary term. They were the first black members of the Bundestag and their entry was hailed as groundbreaking and historic by equal rights campaigners.

Diaby, who has a PhD in chemistry, was born in Senegal and moved to the then East Germany in 1985.

He has increasingly faced racist abuse in recent years. His constituency office in Halle, Saxony Anhalt, has been an arson target, and has had bullets fired through the window. Some staff have faced blackmail attempts to stop them working for him and have been subjected to and threats, Diaby said.

“In the last few years I’ve faced several murder threats. This has now overstepped the mark,” he said. “The hatred that the AfD sows every day with its misanthropic narratives is reflected in concrete psychological and physical violence. This endangers the cohesion of our society. We cannot simply accept this.”