Yes but then all that territory is useless to you, completely irradiated for decades. Plus all of the other long term climate effects. Just stupid on many levels.

Still waiting for someone to realize conventional warheads are plenty destructive and that nukes are actually pointless

Just speaking generally, I feel like the terror threat is at zero immediately following an attack. Mostly because the attack has already happened. These "terror threat levels" are kinda goofy.

EDIT: I hadn't considered copy cats. Fair. Even so, dispense with scaring people and do good police work to catch perpetrators and prevent attacks.