Darren Carroll, former member of the English Defence League and uncle of founder Tommy Robinson, added: "Paul Golding and Jayda Fransen do not represent the British people, their conviction demonstrates they don't care about improving people's lives and treat those around them as pawns to promote their own agenda".
The judge threw out three other charges.
Britain First leader Paul Golding and deputy leader Jayda Fransen talk to the media outside Belfast Laganside Courts after Fransen was released on bail on December 15 in Belfast, Northern Ireland.
They were arrested on May 10 previous year in an investigation into the distribution of leaflets and online videos during an on-going trial at Canterbury Crown Court.
"The fact that completely innocent members of the public were accused of being rapists, making them fear for their own safety, shows how little regard they have for the consequences of their actions". Fransen and Golding, as the court found, also placed anti-Muslim leaflets in the mailboxes of nearby houses.More news: Russia's foes will 'be served poison' - Putin
He made clear that his verdict was based 'solely on admissible evidence heard in court'.
Fransen was convicted of three charges and jailed for 36 weeks.
"She said 'Muslims rape British kids'".
The leaders of the the far-right group Britain First have been convicted of a series of hate crimes against Muslims.
Fransen was convicted of abuse after visiting a house she wrongly believed to be the current address of Sershah Muslimyar, a defendant in the trial.More news: Freezer malfunction leaves more than 2000 frozen eggs and embryos at risk
Fransen shouted through the front door of defendant Tamin Rahmani's home when Miss Best, who was pregnant, was alone with their two children - aged three and 18-months-old - on May 9.
'These defendants were not merely exercising their right to free speech but were instead aiming religiously aggravated abuse at innocent members of the public, ' the prosecutor told the court.
During their trial in January, Folkestone Magistrates' Court heard the pair confronted people they believed were defendants in the gang-rape trial.
"This offending also related to an ongoing criminal trial and the actions taken by Fransen and could easily have derailed the justice process".
Trump stoked global outrage in November after he retweeted a string of anti-Muslim propaganda videos from Fransen's Twitter account, which has since been deleted for violating the social media site's hate crime policies.More news: McDormand's alleged Oscars thief denies grand theft of property charge
The Britain First describes itself as a movement committed to the national sovereignty and independence.
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