Psychology is by its very nature largely subjective.
You guys on the right have rejected out of hand all of our calls for gun control, and said the real problem is mental illness.
Then, when we start suggesting ways to keep the mentally ill away from guns, your response is that its too subjective.
You can't have it both ways. You can't avoid gun control by blaming it on the failure to detect mental health problems, then confess those are so hard to identify it will never work.
1. The United States has a "gun culture." I'm not saying it is good or bad; it just is. Guns being part of the fabric of wide parts of the society and the wide availability of guns would continue even with more restrictive gun laws.
2. To my knowledge, the United States is the only large country (i.e., over 100m population) with said gun culture. Other countries that have a tradition of guns (i.e., Switzerland) are much smaller, more ethnically homogeneous societies and aren't good comparisons.
3. All countries have crazy people, but the United States (again, to my knowledge) is the only large country to have a gun culture coupled with crazy people (and crazy people on lots of medication).
The reason lots of European countries don't have lots of gun crime or massacres like this isn't because they have restrictive gun laws. It's because the populace just simply really isn't into guns. The UK can do a handgun ban, or Australia can do a "turn your guns in" campaign because there simply aren't that many in the country. In the UK, for example, their rates of
crimes committed with guns is lower (there aren't many in the country to begin with), but their overall crime rate is much more comparable to the US, with rates for some non-gun crimes (car theft, kidnapping, breaking and entering, etc.) actually being higher than the US.
The United States is unique because more restrictive gun laws are not going to solve the problem, and standards of who we deem "mentally ill" are pretty arbitrary and subjective. I bet you can define damn near half the population as having some kind of "mental issue" if you wanted to. Just look at the amounts of medication that is prescribed and consumed. It isn't having it both ways; it's just true.