*yawn* I'll humor you.
First of all, I'm not arguing with you that allowing police to carry guns in order to prevent others from carrying guns is like having a huge stockpile of Nukes in order to force others to disarm their stockpiles; stupid and worthless. Police should not carry guns in civilian areas, neither should anyone else. Next, yeah, there is no moral difference, but the practical results are different, a police officer is trained to shoot as a last resort and to aim for non-fatal shots, whereas a scared civilian with a gun will probably shoot someone at the first sign of trouble right in the chest. You make a good point with the morality aspect, but as they say, in theory, practice is no different from theory.