So how is making it more difficult for, good responsible, law-abiding citizens to obtain guns going to help this problem?

What we need to do is enforce the gun laws that we already have. We need stiffer penalties for people who commit crimes with guns. But even that is not going to prevent people like the LV shooter from acting. He went into this hoping to die. How do you defend yourself against someone who wants to die? They are like the Japanese Kamikaze pilots. Threats do not deter them and that is all that laws do. They present the threat of going to jail or being put to death.