Does that include property in Gaza, the West Bank or Lebanon? Because if the people who spray painted something are "terrorists", I want to know what the people who wiped Rafah off the face of the earth are called.
Terrorism is widely understood to be the deployment of military force against civilian populations. Of course states do this all the time, but 'state terrorism' is basically dependent on whether politicians in country A align with country B or not; if they don't, they'll call out state abuses in country B as state terrorism, if not they'll say it's law and order.
Regardless of these nuances, extending the definition to include any kind of property damage is just laughably opportunist.
"Any kind" is quite the load bearing argument there. Let me remind you Europe is under an ongoing land invasion, which is why fucking with its defensive capabilities is unlikely to solicit much sympathies.
I think it’s worth considering that you’re much more likely to be a resident or a citizen than a state when you’re deciding how you feel about these kinds of things.
Damaging military equipment is a military end, not a political one. If it were otherwise, then a military attacking a military would definitionally be terrorism. At that point, you've removed the utility of the word "terrorism" from English and made it synonymous with "armed conflict."
Terrorism being done chiefly to change policies by terrorizing people through symbolic acts is a constrained, generally-accepted definition of terrorism.
Contrast with 9/11, where symbols of American capitalism, filled with civilians, were attacked in order to terrify people who have nothing to do with those buildings into supporting changes in policy that hurt the US.
Which is typically called „arresting“ when a government does it to their own citizens…
> you are not allowed to murder unarmed soldiers,
That's also false, you can absolutely kill unarmed combatants so long as they remain combatants. Eg you can bomb an artillery crew even if they don't have sidearms.
To be eligible for capture, a combatant must generally surrender.
> typically called „arresting“ when a government does it to their own citizens
I encourage you to read up on POW camps. There are no attorneys or rights. You may work POWs. There are cases in which food and medical aid can be severely limited depending on how it is sourced. You may hold POWs functionally forever.
POWs don’t have attorneys, but they do have rights. Limiting food and medical aid is a war crime.
Of course, everybody routinely violates the rights of POWs, and only the losers ever get prosecuted.