Mayor Bloomberg understands that the ONLY right delegated to the government is the right to self-defense.
To remove the use of force from citizen interactions so that individuals may deal with each other only by reason and persuasion, citizens delegate their right to self-defense to their government. – Royal Serf
When there is no time to call the police, using force to defend oneself is moral and legal.
Outlawing shouting “fire!” in a place like a theater is self-defense, not speech-infringement, because the prohibited action could instantaneously cause deaths and injuries – there is no time to counter the “speech”.
A shooter could kill and maim at the blink of an eye. Background check of gun buyers, which Mayor Bloomberg advocates for, is self-defense, not Second Amendment infringement, since it does not prevent rights-respecting citizens from buying guns.
To oppose laws purposed to prevent instantaneous deaths and that do allow the purchase of arms by rights-respecters is to reject the "to secure rights" mandate of the government. It is anarchism.
Fundamentally, Mayor Michael Bloomberg is a realist, a rights-respecter, and a man of integrity: he wants freedom and he is acting to defend it. It is great that a thinker and man of action, a Prime Mover who has created great wealth, is standing up for Reason and Rights.