I support our second amendment, but I am against people feeling empowered to carry their legally permitted weapons openly and here is why: many aren't trained to retain total control of their own weapons and there may come a time when somebody is able to grab it away from them and use it against innocent bystanders.
Americans are used to seeing police openly carrying firearms. But because they are uniformed and easily identifiable and their position in society still commands some level of respect from most of society, most would never dream of overpowering or subduing a police officer in an attempt to grab their weapon away from them and then use it against innocents.
Not so for some schlub picking his nose in a Def Leppard t-shirt, who may or may not have had the proper training in order to maintain control of their own weapon. Some crazy asshole may get it in his head that Mr. Nose Picker doesn't look all that tough and that he could probably wrest Mr. N. P.'s crappy little 9mm away from him and then use it to cause some righteous anarchy.
And that is it in a nutshell. Gun control in this case means maintaining control of who is in possession of ones own weapon. I am not convinced that the majority of Americans are wholly prepared to do exactly that, which is why I'd prefer that those who choose to carry a legally registered firearm keep it concealed.