Jonathan Jones has been found guilty of murder at Nottingham Crown Court.
The jury returned a unanimous verdict over the stabbing of John Parker in St Ann's on Sunday, May 31.
Jones admitted manslaughter but denied murder during the six-day trial.
His defence was that he did not intend to cause "really serious harm" to Mr Parker, 43, of Birkin Avenue, Hyson Green.
After Jones, 39, was taken to the cells, Judge Stuart Rafferty QC praised the jury of four women and eight men, for their full "care and attention".
He added: "There is no criticism from me about your attention to the case. As far as I am concerned, yours is the most important public service anyone can perform."
Jones, of Barbury Drive, Clifton, will return to court on Thursday to be sentenced. He shouted out in the court after the jury returned its verdict.
The judge told defence barrister Shaun Smith QC: "I prefer to sentence your client in his presence but if he behaves in the way he has, I will proceed in his absence."
Mr Smith replied: "It will not be the first time that has been the reaction in a case."
Prosecutor Michael Evans QC said the judge would hear how the murder had affected Mr Parker's family, including his 16-year-old daughter.
Jones's list of previous convictions will also be revealed before he is sentenced.
On the day of the killing, Jones caused trouble in a shop, making racist remarks after claiming another customer was guilty of queue jumping.
Jones kept one hand in his right pocket where the knife was hidden, said Mr Evans.
Near the Victoria Centre, he was among a group of people who clashed with Mr Parker, who had been with a woman shoplifter. Punches were thrown and Jones's girlfriend claimed to have been struck.
Soon after, Jones and a friend, Robert Higgins, spotted Mr Parker on Hedderley Close, St Ann's. Jones had the knife in his right hand as he swung a punch at Mr Parker. It dug into the carotid artery, causing a wound deeper than the length of the blade.
Mr Parker fell dying, saying: "He's stabbed me." Blood seeped through his fingers as he put a hand to his neck. His girlfriend took off her cardigan and tried to staunch the bleeding.
Jones walked off, went to a house where he forced a woman to get rid of his coat and the knife, which was found in a sewer.
He later tried to blame Mr Higgins, who had the dead man's blood on his coat. Both men were arrested on suspicion of murder but Mr Higgins was later released.
In a letter from jail, Jones asked his girlfriend to tell police that Mr Higgins had confessed to the murder, writing: "He is trying to stitch me up. There is no way I can do life."