Well, there's been a shitton of arson and hybrid warfare attacks by the Russians all over Europe, hardly a stretch to suspect they have targeted the US as well. Very effective and easy form of terror attack to carry out, something the Russians have been extremely fond of and used to great effect for decades upon decades...
The fact that the troll factories accuse environmentalists for it is pretty telling as well, every accusation is an admission of guilt as usual...
Russian arson attacks:
https://apnews.com/article/russia-estonia-sabotage-arson-ukraine-554442e8c139f4a1df4d2df78d76f7a4
https://globalnews.ca/news/11281090/russia-sabotage-campaigns-warning-europe-intelligence/
https://en.wikipedia.org/wiki/Incendiary_incidents_in_Europe_2024
Russian hybrid warfare: