Tommy Robinson has 'a price on his head' in jail with people offered drugs and mobile phones to kill him
Robinson - who pleaded guilty to the contempt of court charge - appeared before the court under his real name, Stephen Christopher Yaxley-Lennon.
His barrister, Matthew Harding, said Robinson now felt "deep regret" after realising the potential consequences of his actions.
He said: "I have to be realistic in relation to the submission that what he did was provocative in challenging individuals."
Mr Harding said Robinson was aware of the reporting restriction in place in the case but thought what he was saying on camera was already in the public domain.
The barrister added: "He was mindful, having spoken to others and taken advice, not to say things that he thought would actually prejudice these proceedings.
"He did not try to cause difficulties for the court process."
Mr Harding said Robinson had served time in prison before and had been the victim of assaults in custody.
He said there had been "a price on his head" during his last prison term and inmates had been offered the reward of drugs and mobile phones to kill him.
The married father-of-three founded the English Defence League in Luton in 2009 before resigning in 2013.
The organisation was responsible for violent marches on the streets where members clashed with police and counter-demonstrators.