...The main argument against Constitutional Carry: it’s dangerous! If you let people carry a gun without a background check and training, they’ll shoot the wrong person! Cops won’t know who’s the good guy and who’s the bad guy! And there’ll be more people carrying, leading to more “gun violence.”
You could counter these objections one-by-one, but it’s better to just say “look at Vermont.” Green Mountain State residents have enjoyed constitutional carry since the Constitution was enacted. According to the FBI’s 2015 stats, Vermont is the safest state in the country, with a violent crime rate of 118 incidents per 100k residents.
That’s not to say Vermont is the safest state in the U.S. because of constitutional carry. But their crime rates show that constitutional carry doesn’t create crime. Why would it? Criminals get guns no matter what the law says (they’re criminals, after all). Constitutional carry makes it easier for law-abiding citizens to keep and bear arms....
http://concealednation.org/2017/02/constitutional-carry-the-three-best-arguments-in-favor/