What an interesting chart.
What is your source? The PDF is just a chart with no attribution or documentation.
Israel is fairly close to the origin point (0,0), but then knives and bombs aren't part of the graph. However, it does show that even with a lot of guns around, their domestic violence rate is low.
I wonder why Switzerland is off the beam, so to speak?
And the chart shows my point that "We have more mass murders and a higher murder rate per capita than most industrialized nations, nations where citizens can use firearms for hunting, recreation, or self defense."