Here is a little information that might help. I, unfortunately agree you probably won't change their minds, but it's always nice to have some educated evidence (instead of made up junk) to back what you say.
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Have there been any problems in states with shall-issue concealed carry laws?
Benefits strongly outweigh any problems.
In the state of Washington, a state with demographics virtually identical to Minnesota, 36 years of experience with "non-discretionary shall issue" laws and NO problems prove that the crime deterring benefits of these laws unequivocally outweigh any concerns. That is a fact!
Accidental shootings in states with "non-discretionary shall issue" laws in 1992 were 36% less in states with "non-discretionary shall issue" laws than other states. A majority of states (31) had 36% fewer accidental deaths than the remaining 19 states. The total number of accidental deaths in 1992 was 1409. A detailed study of all counties indicates that in counties with populations over 100,000 (27 accidental handgun deaths occurred in counties with shall Issue laws) a net increase in accidental deaths due to handguns was 6 tenths of one percent. If "non-discretionary shall issue" laws where implemented nationally the result would be about 9 more accidental handgun deaths per year vs. a net reduction of totals deaths between 1,561 and 1767.
The most comprehensive and carefully done examination of successful defensive gun uses by civilians determined that there were in excess of 2.5 million DGU s each year, with 400,000 incidents in which the victim believed that using the gun (almost always by brandishing) almost certainly saved an innocent life. In Florida , between Oct. 1987 and April 1994 only 18 crimes were committed by permitees out of 221,443 permit holders. Multnomah County, Oregon, has issued 11,140 permits between 1990 and 1994 and experienced 5 permit holders involved in shootings, 3 were deemed justified by Grand Juries, one was an accidental rifle firing while being unloaded, and one was an assault. In Texas by the end of 1996 82,000 permits had been issued and only one permitted fatal shooting had occurred. The shooting was deemed justified.
Each year some permits are revoked for various reasons. The number is extremely small. Nevertheless, any weighing of the benefits over problems will demonstrate that problems are minimal in comparison to stopping 80,000 to several million crimes per year.