The two groups were recorded fighting at a train station, with the Extinction Rebellion activists stopping commuters by standing on top of a train.
Extinction Rebellion is in the second week of a fresh civil disobedience campaign that has targeted government buildings, a local airport and financial institutions such as BlackRock to highlight the threat posed by global warming.
"I'm doing this primarily for my grandchildren", said Phil Kingston, 83, who had glued himself to a Docklands Light Railway train at Shadwell station in East London, and has been arrested multiple times at previous protests.
A Transport for London staff member attempted to stop commuters from clashing with the man, shouting "don't do it" as they tried to attack him.
BTP said there had been four arrests so far at Stratford and Canning Town on the Jubilee Line.
Eight protesters were arrested, police said, according to the outlet.
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"Specialist Protest Removal Teams remain at Shadwell station, and are working to resume services as soon as possible".
Video posted to social media shows the wild scenes, including the ugly confrontation between commuters and the protester, compete with pushing and shoving and wild punches.
The Jubilee line is running with minor delays whilst there are now severe delays on the DLR from Bank to Lewisham and from Tower Gateway to Beckton.
Extinction Rebellion makes much of being a non-violent movement, but the violent response the train-climbing protestor gives to a member of the public trying to interfere with his moment of fame may go some way to damaging that claim.
Even London's left-wing mayor Sadiq Khan, who has otherwise been rather sympathetic to Extinction Rebellion, condemned their actions on the Tube, saying it was "extremely dangeorus, counterproductive and is causing unacceptable disruption to Londoners who use public transport to get to work".
"It is also an unfair burden on our already overstretched police officers". "I urge demonstrators to protest peacefully and within the boundaries of the law".