40 of 50 states are now shall-issue. One can hardly say it is against the norm for people to carry. Indeed, the states that DON'T allow law-abiding citizens to arm themselves are conspicuously in the minority.
There have been three incidents in Utah in the last 8 or so years where a dude (or in one case a woman) just snapped and killed people they didn't know in a public place. ALL THREE were committed by immigrant refugees with histories of mental problems. NONE were by permit holders.
IF we line in a nation with 11,000 homicides a year or so, ask her to add up ALL of the high-profile columbines/amish schoolhouses/postal incidents/whatever she can think of EVER, and add the total number of people killed. If she could hit 200 I would be surprised. That's 200 EVER, against 11,000 ANNUALLY of gang violence, domestic disputes, and drug trafficking. (I know there are more than that,) The point is, she is concerned about a tiny problem. She is unwilling to face a more practical reality of where violence really is.