As to winning debates - facts seem to be far too rarely considered in moderation or "winning" debates on Slashdot.
While that may be true, you cited the Cato institution, Fox News, something called "gunssavelives.net," the WJS opinion page, opinion pieces in the Boston Globe, The Telegraph, and The Washington Examiner, something called "americanthinker.com," a weasel-worded gallop poll, and an article from the Hill that is quoting the the communications director for the National Republican Senatorial Committee pointing out that a couple of democrats in Montana and South Dakota aren't toeing the gun-control line. These articles all make the argument that we need more guns and less regulation because guns make us safer. Lastly, you pulled out that old canard that the UK has a higher crime rate than the US to really drive the point home. But you cleverly avoid delving into the type of crime.
Now, watch this: The rate of firearm-related deaths per capita is 10.23 in the US and 0.25 in the UK. The only countries (of the 75 listed) with higher rates than the US are: Panama, Mexico, Columbia, South Africa, Brazil, Swaziland, Guatemala, El Salvador, Honduras, and Jamaica. Interestingly, the country with the lowest rate, Japan, has some of the most restrictive gun laws in the world. Of course, I'm not suggesting a causal relationship, but I will point out that the presence of a gun is a prerequisite to any form of gun violence.
Do you see the difference?