He's also trying to keep you and your fellow little cupcakes-in-arms from stupidly spreading the fire from the theater to the restaurant next door, to the bakery, to the car dealership up the road and to all the other shops on Main Street.
He's also protecting the other firefighters who might have to physically go in to save you, the EMTs who might have to keep you alive, the doctors and nurses at the hospital who might have to take care of you. He's also making sure that a hospital bed and medical supplies are available for someone else who needs them.
You'll have every right to go to a movie again, you sweet little cupcake, once the fire is out and the theater is cleaned up.
In the meantime, every minute you stand there and argue with the fire chief is a minute he could be working to make the theater safe for you to go to a movie again.
He's not infringing on your civil liberties, he's keeping you and all your friends alive so that we all can continue to enjoy our civil liberties.