Unchecked Terrorism has non stationary distribution and can lead to deadlier events that are orders of magnitude larger. Further why pick a year and not a day? At any given day the number of deaths due to Terrorism are close to zero, except you know on a tragic day a decade ago in september.
So stop the underlying process? Terrorist organizations aren't quiet about their problems, that tragic day in September was in opposition to US interference in their lives. If our goal was combatting terrorism, we picked a terrible way of addressing the problem.
To you these attacks are a valid grievance redressal mechanisms??? Is that the path every disenfranchised group should take?? If you are okay with such approach, no point in having a discussion.
No, but neither is the "War on Terror."
I don't buy in that this problem is large enough not that this solution would be acceptable if it was