There have been many bitter arguments in the short history of the AfD.
But on Sunday big shovels were added to the continuation of the federal party conference in Kalkar, North Rhine-Westphalia.
That was also clear to the 500 or more delegates.
"We are currently setting fire to our own house," said one of them around noon after he had witnessed the hostility in which his party friends had attacked one another.
What was remarkable about the clashes was not only the immense anger directed against party leader Jörg Meuthen.