First off, there is no “epidemic of firearm mass murder”. Murder rates are at something like a 50 year low. The mass murder rate in the U.S. is in the same general range as the rest of the world. Unless you want to compare the U.S. with Europe in the 20th century. In that case the rate is far, far, lower. And you know why? Because the so much blood was spilled by governments murdering their own citizens. Closest the U.S. has had that might be compared is some of the Indian wars. And guess what, the North American natives were banned from owning firearms.
Genocide and firearm restrictions are closely related:
Which leads is the main point to be made about this cartoon. The cartoonist leaves no doubt what they think of the NRA, gun owners, and those who insist the specific enumerated right to keep and bear arms means what it says, “shall not be infringed”.
With such an attitude they are the same path to the murderous behavior of European governments in the 20th Century. If you give up your guns, or even register your guns, we are at a much higher than acceptable risk of a similar result here.