These battery attacks are so easy that a disgruntled employee in China could kill thousands in the US though
if heznobollas had done it, yes, it would have been terrorism. they are a non-state actor that's been constantly firing rockets into a legitimate state for a year, and are using violence against a general population to attempt to change the policy of their legitimately elected government.
it's precisely because it was done by a legitimate state defending its population, and in this case inflicting the damage on the very terrorists that sought the communication technology with minimal collateral damage that it's a legitimate weapon of war.
words matter.
If they're using terrorist actions, those should also be considered legitimate