A gun is a tool. It makes killing a bit easier, some on a greater scale. You want one when it's needed. But who determines when you need it? If someone wants to kill a group of people, they can do it without a gun. So now what comes into the equation to eliminate useless mass murder? Cars? IED? Chemicals?
Thinking that eliminating guns will take care of the problem, just places the problem into a different arena. A nail gun can be modified to kill. If we start with guns, it's be nail guns, chemicals, cars, etc etc that will take the blame. The problem is the person. I would give up the freedom of having the government not spy on me rather than to give up my gun.
So, I'm all for a stricter process in obtaining guns and even making it stronger to get certain guns. But not to deny responsible people from owning guns. Background checks have to be stronger with todays gun abilities. Anyone can still buy a musket, which is what the 2nd amendment was based. The more damage a gun can do, the more responsible a person needs to be to own it.