The people behind Extinction Rebellion advocate a political agenda with ambitions that reach far beyond environmentalism. It is a campaign that seeks to use mass civil disobedience over climate change, to impose full system change to the democratic order. Yet, the underlying extremism of the campaign has been largely obscured from public view by what many see as the fundamental legitimacy of their stated cause.
Says the right-wing think-tank Policy Exchange
https://policyexchange.org.uk/publication/extremism-rebellion/
A 'full system change' seems a very attractive proposal