However, I'm only willing to take those as anecdotal evidence for promoting less gun control: they are all written by people and groups who are heavily invested against gun control, i.e. a very high risk of motivated thinking, research and writing.
(Sure, one might point at all the references and evidence they provide, but what are they not saying? What about a discussion of the countries around the world with gun control that has (as far as I can see) no racist or genocidal purpose (e.g. most of modern Europe, Australia, New Zealand)?)