A chef repeatedly slapped a five-year-old boy across the head on Bonfire Night, a judge was told.
Two brothers intervened as Graham Nadine dragged the child down a street by his ear and one of the brothers was bitten by the defendant.
Nadine, 39, of Welland Close, Bispham, denied assaulting the boy and a man but was found guilty of both offences after a trial.
He was sentenced to four months in prison, suspended for 12 months, ordered to do 80 hours unpaid work for the community and told to pay £100 compensation to the man plus £400 costs.
He was sentenced by District Judge Margaret McCormack sitting at Blackpool Magistrates’ Court.
The judge told Nadine: “This was just appalling behaviour.
“Members of the public who were disgusted by your behaviour felt compelled to intervene and one was assaulted.”
Pam Smith, prosecuting, said the incident happened on November 5, at 6.45pm.
The court heard two brothers on Hastings Avenue, Bispham, saw Nadine slap the back of a young boy’s head so hard he fell forwards.
Nadine also slapped the boy across the head twice more, grabbed his ear and dragged him down the street.
The brothers intervened, with one getting Nadine in a bearhug. Nadine then bit that brother on the hand and swore at both brothers, threatening to kill them.
Allan Cobain, defending, said Nadine maintained he had not struck the child. Nadine had said the two brothers were very aggressive and he acted in self-defence.
He added he had lost his job as a chef at a care home as a result of the case.