The BBC refers to Hamas as a militant group, despite it being proscribed a terrorist organisation in the UK, and described its slaughter of hundreds of innocent civilians as a militant attack.
Footage of the encounter in London shows the man, who is wearing a high-vis jacket revealing his employer s logo, being confronted by a member of the public.
Tehran has repeatedly warned that an invasion of Gaza would be met with a response from other fronts - after a day where Israel also faced threats from Lebanon in the north.
A row exploded on the streets of London after a man was caught allegedly writing the word coloniser on posters of Israeli children kidnapped by terrorists Hamas.