A letter claiming the suspected arson attack in the name of a far-left militant group calling itself the “Volcano Group” surfaced on an alternative media website on Tuesday.

“We sabotaged Tesla,” read the letter, posted on website kontrapolis.info, describing the attack as a gift marking March 8 - International Women’s Day. “Tesla consumes earth, resources, people, workers and in return spits out 6,000 SUVs, killer cars and monster trucks each week.”

Against the Tesla expansion there is the https://t-den-hahn-abdrehen.org/ "middle class, civil" organization as well as the https://teslastoppen.noblogs.org/ "activits" organization that is running the tree houses. Given the cooperation and groups involved it is clear that there is a non violent consensus.