Guns? No. Violence? Yes. The Left loves them a good riot. They love to burn, loot, and pillage. They cover everything in graffiti, trash whole towns, beat their opposition, and in general just love violence. They seem to not be good at killing people unless they obtain power, then they have no rivals. Of course, in those situations they make sure to keep the violence hidden so they don't have to suffer any of the anguish those in their prison camps, gulags, concentration camps, or whatever, are suffering.
On the Right, it's a nut with a gun. Yea, the body count is often impressive for a single shooter, but they pose no threat to society as a whole, just the 2 or 300 yards around wherever they happen to be.
So, the death score between the two might be,
Rightwing nut job 10
Leftwing dictator 10,000,000