This wasnt a terror attack.
What definition are you using?
Are all mass shooting acts of terrorism? It’s an important legal question; insurance claims may be denied if the venue is not covered for terrorism (which is frequently not a covered event in standard “all risks” policies). I know a little about real estate, and suspect one legitimate reason authorities think twice before assigning a terrorism attribution is that it can result in $millions in uncovered claims for the unfortunate property owner.