A 40-year-old Bermondsey man has been imprisoned for three years and nine months for a racially aggravated assault in Walworth in May this year.
He was found guilty and sentenced on 26 November.
The incident occurred on Sunday 16 May. Bull, who is white, approached two black men waiting at a bus stop in Walworth Road at around 5am. He claimed that he represented Hitler and began to racially insult the two men, saying he was a Nazi and giving the Nazi salute.
He then assaulted one of the men by headbutting him. The 33-year-old victim ran away, pursued by Bull threatening him with a knife.
The victim managed to call the police and patrol officers arrived. They located and finally detained Bull in an estate behind East Street.
The victim was taken to hospital but later released.
The incident was investigated by Southwark Police Community Safety Unit.
"The incident has had long term effects on the victim who is still apprehensive about going out." said DC Palbinder Singh. "This conviction reflects the determination of Southwark Police to stamp out racism, and the sentencing illustrates how seriously it is taken by the courts."
"Anyone making racial assaults or threats should reflect on where this behaviour could lead."