Genuine question: if the motivation for this bombing was not political or ideological, what was it then?
There needs to be a distinction between:
* attacking civilians (terrorism)
* attacking The System, but going for softer targets and not taking its military might directly head on (guerilla war)
* attacking The System, in a Military v Military setting (regular warfare)
While there are groups that will never have the direct strength to take a head on fight, I think it's beneficial to have a category showing that they limit their targets to agents of the system rather than any random civilian.