Wood thieves fall in a different category; Those are the worst offenders by number. Companies or local goverments stealing trees from public parks has became a too common activity since the austericide. Very profitable also; most people don't understand that plants have a big economical value just as raw materials. But is not this case; nobody tried to remove the wood.

Revenge is a fact. Some protected very old oaks had been killed in Spain after tourism to see them became too invasive. Probably not the same with the sycamore, but it could be a team of badly advised locals, for sure.

The fact is that there is a global pattern in Europe and USA of manipulating rednecks and gullible people against nature. Social media is doing this all the time resulting in a lot of wildfires in Europe lately. Remote manipulation seems probable here.