Not sure how you came up with that....I'm not saying that a ccw policy will result in zero homicides. The idea behind ccw is giving us a fair chance. Your second assumption is pure bullsh*t. A ccw policy would allow, not require us to be able to carry. Most of us ( at least in my neck of the woods) already own firearms. How is being able to carry my Glock 27 going to cause me to be suicidal and put one in my head?
It's a fact, in populations that have a higher percentage of owned/carried firearms there is a higher percentage of firearm related suicides. Combine that with the fact that in populations with higher stress jobs, especially those that deal with injured people, people with psychiatric issues, and death, the suicide rate is much higher. I'm not making it up...it's just true.
It's like the fact that people who own guns experience more gun accidents, people who don't own guns don't experience accidental shootings...its just fact..