Here are a few.

Racism:

http://constitution.org/cmt/cramer/racist_roots.htm

http://www.guncite.com/journals/gun_control_wtr8512.html

Genocide:

http://www.davekopel.com/2a/Foreign/gun-bans-and-genocide.ht...

http://jpfo.org/filegen-a-m/deathgc.htm

Ah, interesting, it does seem that gun control can be a tool for racism and genocide.

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)?)

That's a ludicrous argument. There is a fairly good correlation with gun control and welfare states - I wonder if gun control is a communist plot.