The pro-gun lobby uses several myths to sway the minds of decent pro-gun Americans. Unfortunately, these myths can and have led to tragic increases in gun violence and death. Gun violence is shown to increase after permit-less carry laws go into effect. The dangers of lax gun laws are understood by most Americans, which is why not only civilians are against such measures, but large swaths of law enforcement across the country as well.
While any side of an issue can drum up curated statistics to bolster their political arguments, the truth is that permit-less carry laws don't lead to an increase in violent crime or murder. Beyond the data, common sense dictates that criminals, by definition, don't follow the law. Constitutional carry doesn't necessarily lower crime, but it does allow law-abiding citizens to carry more easily and thus protect themselves from criminals who never cared about the law in the first place.