I just read the article's conclusion, and it's just says "more gun control != fewer deaths". My comment is saying that their data is wrong (or cherrypicked) and their attempt to disprove any correlation doesn't hold water.

What I would expect to see would be a scatter graph showing all the countries in the world with guns on one axis and homicides on the other axis - that would make the article a bit more scientific rather than just cherrypicking a few countries. Most of their argument seems to be based on the fact that Russia has a high homicide rate and they have banned handguns. However we all know that Russia has law and order issues.

EDIT: I just did a quick search, and it seems there are graphs of homicides vs gun ownership for all countries, e.g. http://www.neontommy.com/news/2012/07/doing-math-guns

So it certainly does look like gun ownership isn't correlated to homicide rates. However that doesn't necessarily mean that gun control is a bad idea. Does gun control reduce homicides when you control for other factors? The article is arguing that it does not, but my argument is that Canada vs USA shows that it does.