The interest group process in which the NRA participates is not necessarily democratic. The NRA is only one example of an instance where a well-organized and motivated minority wins out over a large but relatively apathetic majority. I do not believe that is correct. They can speak for themselves. But I don't believe that's an accurate representation of their position.
Southern states have the least strict laws and have the highest crime rates.
No one that I know of is proposing a total ban on guns. Kleck's estimate is not very reliable. That data is used and accepted by everyone, including Kleck. So, the Amendment says that gun ownership is tied to militia service. Where do you get the facts that in past years the majority of Americans has supported even restrictions such as banning possession of hand guns.