Beyond that: the class of said property and its victim. It's not a factory filled with grimy laborers, it's not a warehouse full of sweaty workers, it's not a public housing filled with minority families, it's a swanky hi-tech finance ivory towers filled with the rich and beautiful who have earned their position as the top dogs of the neoliberal world order by their bootstraps. That's why the attack hits the American consciousness hard, because instead of happening to some poor bastards in the savage south, instead it's the symbol of American dream that got hit.