What do these events have in common?

I'll give it to you from an Australian point of view. We like other countries believe America is filled with more crazies than any other. The statistics say you have more of these incidents because you have a greater population, like America has more serial killers as there are more ppl. But in truth with the economy broken, ppl who were walking on thin ice mentally and emotionally are now being broken and they are not able to get any medical treatment as yet again in America, there is no health care system set for all of the ppl only those who work. So many slip under the radar and then SNAP they go on a shooting spree. There will be many who commit suicide but they never discuss that on the news unless the person is famous.