What is the real issue?

I don't know about all the different kind of guns that are out there and I don't know what all the requirements are for getting a gun, all I know is that there will come a day when all the good people that couldn't get guns because of too much gun control will not be able to protect themselves from the evil people that were able to obtain guns illegally. Are guns really the issue here? no they are not. What causes these killers to want to kill in the first place? There are many causes, but one of the biggest is drugs, not only illegal, but also legal. Mental illness is a huge problem of our day and the way we are handling it is not working. It is just making things worse. These drugs are making people act out their worse nightmares. Causing them to do things, they normally would not do. There has got to be a better way. And if people would just study on their own, and not just rely on "the arm of flesh" they would find that there is already a better way.