I understand the motivation of people turning a blind eye to the truth. Casting the US government in a bad light is a reflection on you. Saying anything critical of the Federal Government is a reflection on each and every one of us that we are bad people too. They would rather not know about the bad things their government does so they can sleep better at night. These are week minded people and the country is full of them.
You can change the semantics for the motivation involved in the crime to Islamic Terrorist, and you get the the whole country in a state of panic and hysteria.
What if it were just a couple of Christians out for revenge on some people they knew that would be there, or a couple of gamers testing their skills? Would the entire city go into lockdown in those situations? What special skills do Islamic Terrorists have that make them Super Criminals?