Well then, let's hear that logic in action! Please explain to us, using simple words so we can understand, how the concept of causal chain justifies gun free zones and more importantly, how they deter evil people from doing bad things.
For those who are not as learned nor as intelligent as you clearly are, here's what Webster has to say about the legal definition of chain of causation: the causal connection between an original cause and its subsequent effects especially as a basis for criminal or civil liability.
Enlighten us oh logical one!
The original cause of the murder is the gun. Without the gun there would be no murder, no need for gun free zones. The causal chain begins with the cause, and the cause is the gun. Take the gun away and the entire chain collapses.
/——/ Except for the home made explosives...
All the other ways of killing masses of people are more complicated and difficult: so your solution is just to make it easier for the killer and provide him with easy to acquire, cheap, automatic rifles. That's very logical, if your objective is to allow/help depraved people to kill masses and masses of people.
/——-/ ban guns like in Detroit and Chicago? Is that your solution?
Again, you are making a fallacious argument. A false analogy. The problem of gun deaths in our inner cities is not because people are purposely going out to kill masses of innocent people just to get their rocks off. The problem in the inner cities is the drug culture, gangs, poverty, and lack of education. We have been trying to solve those problems for decades. The availablity of guns has made the situation worse as far as the loss of life. The more guns in circulation, the more guns the criminals get their hands on.
When guns are taken out of circulation, they become less available on the black market. In countries with strict gun laws, crime is lower, especially gun deaths.
Spain, for example, has very strict gun laws and automatic weapons are completely prohibited to private citizens. Spain has one of the lowest crime rates in Europe. There are only 10 guns per 100 people as opposed to 100 in the States.
It is not true that when guns are banned, only the criminals have them. That theory/myth is debunked by all the data.
For example, that girl in San Francisco who was killed by an illegal with a gun: he got the gun out of a car where the legal owner left it unsecured. If it weren't for that legal gun, she'd still be alive. The gun is the first link in the causal gun.