Can you (or a populace) be influenced by something you are unaware of? If so, you can be a victim of an act terrorism without knowing of the act. If a terroris

Can you (or a populace) be influenced by something you are unaware of? If so, you can be a victim of an act terrorism without knowing of the act. If a terrorist shoots my sister, and nobody knows it was a terrorist plot, the destabilization and other negative effects are still there. I will be afraid, perhaps not of ISIS, but I will generally be terrified that someone might shoot me too.