[RockCoach]

I'm not sure about the "eco-sabotage" angle.

In the past, the same group that claims responsibility for this attack, conducted arson attacks on the public transport infrastructure accusing the train company of collaborating with the military-industrial complex or some similar farfetched excuse.

It seems to me like they just like to start fires and destroy things to cause chaos (under the pretense that there is a political justification for it).