Switzerland is the most heavily armed nation, and yet has practically no homicides. Same can be said of Japan, in which they are disarmed. On Australia, the data is inconclusive, as their experiment is in the relative youthful stages of long term data. Australia has seen a spike in violent crime recently, but I would refrain from using them for comparison purposes until there's at least ten more year worth of data to draw from.
However, in the United States, the problems are much more complex. Do you live on a rural ranch in New Mexico near the US-Mexican border where cartels are as heavily armed in many cases as the US military? Do you live on a rural farm in Kentucky where your neighbors maybe in high end meth production in a county with literally just a couple of law enforcement officers available? The problem is trying to narrow down the problems of such a vast country into a few simple statements.
Truth is the law already prohibits the mentally ill & felons from legally purchasing guns. However, the loopholes are astounding because the money was never invested to get all 50 state to use the same database. Then, with state by state HIPPA laws, mental health professionals are too afraid of being sued by their patients to do the due dilligence on what is needed, and in other states, felons are often granted full rights back so that they can vote, which in some states include gun rights. There's alot to unpackage to have real reform.
Speaking as someone on the outside looking in- I do understand the need for gun ownership for protection and hunting purposes. However, it really feels like it has been taken to an extreme level and needs to be reined in.
For instance- would assault rifles and automatic weapons really be needed for hunting or self-defense?
And as for mental illness- as much as I see your point about responsible, medicated gun owners who have minor mental illness, as a point of public safety, I personally would feel better with stricter restrictions.In the end, the statistics speak for themselves. Places like Australia and Japan have proven that limiting gun ownership leads to a big drop in gun related deaths and shootings. So really it becomes a question of what is more important- the lives of potential future victims, or the freedom to carry.