Don’t they generally claim credit?
Not that I am aware of.
I actually saw trail of attempted destruction of 3 wheat fields at harvest time 10 years ago. Someone driving down road and setting one after another. (not major highway)
A week later I went to a farm show, the FBI had a booth there. I told them about it. They told me it sounded like Earth Liberation Front. It is more common up in the NW part of the USA.
Leftie Crazies.