In Dog Day Afternoon with Al Pacino from 1975 I am wondering, when the cops showed up Sonny just made it look like a publicity stunt instead of someone who actually means business.
To me it didn't make any sense. If the police knew that he was'nt willing to use violence, then they would have taken advantage of that. The fact that he is an armed bank robber requires possible killings of police and hostages if things go wrong. And if the cops truly believed about a dozen young women were about to be murdered on live television they probably would have been a lot more likely to give into his demands instead of double crossing him. Also, the police ended up killing his friend Sal in cold blood, without even giving him a chance.
Why didn't Sonny just start killing hostages instead of compromising and playing games with the police and releasing them one after another?