Re: A gun is involved in every single mass shooting.
Most people in the world (i.e. the populations of India, China, Indonesia, and Sub-Saharan Africa) get very little, if any, free mental health and medical care at more than a primitive level. In all these areas mass murders (mass....not just four people) occur with some regularity. In the US arson in poor urban areas is not a bit rare. Remove those areas from the statistics and America, for all its guns, is as safe as France. The data for the US is available on the US Department of Justice website. For the referred-to regions, Nexis or Google suffices.