Re: Causes
I'm sorry to contradict you, but shootings did not start in 90s. They started in 2000.
My opinion on that, as I have already pointed out in these hallowed pages, is that it is the access to Internet that started this whole sorry mess.
Before the Internet, the wackos felt alone, isolated. Without access to the Internet, they did not act on their pulsions because they did not know that other people thought like them.
When the Internet became readily available to the general public, these wackos suddenly discovered that there were a lot of other wackos out there, and they were encouraged to act on their pulsions.
And now here we are.
Personally, I'm glad to live in France, where this kind of nonsense is (almost) non-existant.