Eco-campaigners Insulate Britain have compared inaction over climate change to those who were "passive" when the Nazis took power in 1930s Germany.
The environmental campaigning group, which stage protests blocking major roads, said people who are silent on climate issues will go down in history as “bystanders".
In a tweet, Insulate Britain wrote: "Those who know and are silent now will be known as bystanders, just as those amongst the general population in Germany who were passive and indifferent to the rise of Nazi Germany and the escalating persecution that culminated in the Holocaust."
Reacting to the tweet, Karen Pollock, chief executive of the Holocaust Educational Trust, said: "This has to stop. When they use the Holocaust to make their points, do these people ever consider the people who actually went through it?"
Insulate Britain activists have been obstructing major roads as part of their campaign, often resulting in heated clashes with motorists.
The group, which demands all of Britian's home are insulated by 2030, has pledged to continue until the government acts.
Elsewhere, protesters at Cop26 waving Palestinian flags were filmed saying, "Israel is destroying the climate in Palestine."
When a man confronted them to ask them what they were doing and said that Israel plants "more trees than any other country", they told him to "F*** off."
This is antisemitism in 2021, in line with how antisemitism has always been. Insane, illogical, conspiratorial, obsessive. pic.twitter.com/LYApik2gxl
— Blake Flayton (@blakeflayton) November 8, 2021
Last week, the Archbishop of Canterbury apologised after he compared the climate change crisis to the Holocaust.