obvious Child writes:
The definitions you provide make military operations terrorist operations.
You seem to be missing the clear intent of terrorism: terror.
Blow up a few planes and people are terrified to fly - causing all kinds of disruption. Blow up a few buildings and people are terrified to go to work - causing all kinds of disruption. In an atmosphere where such acts are expected, a bomb threat causes as much terror and disruption as a real bomb.
The question is: Does spiking a few trees terrify loggers so they can't work? Is that the intent at all? Or is the intent just to draw attention to "the cause"?
On the other hand, what's the intent behind bombing an abortion clinic? Is it to deter women from having abortions?
“Faith moves mountains, but only knowledge moves them to the right place” -- Joseph Goebbels