Statistically speaking, people that have conceal carry licenses are less likely to engage in criminal activity than the average person, and less likely to shoot a person in general. The people to worry about are the people that carry firearms without having a valid carry license. (This doesn’t apply in the relatively few states that don’t require permits to carry concealed firearms.) Essentially, people that obey one law–getting a permit before they carry a firearm–tend to be likely to obey most laws.
Fair enough, though a person with a gun is much more likely to shoot me than a person without a gun. Any measure to reduce the amount of people in my vicinity carrying guns has my full support. If 1/1000 (number pulled out of my ass obviously) gun owners end up shooing someone, and you reduce the amount of people around me carrying guns from 1000 to 10, you’ve just dramatically increased my statistical probability of living a full life.
I actually looked and couldn’t find the murder rate in the population of gun owners with basic googling but the actual number doesn’t matter when it’s being compared to 0.