I don't feel as if gun control is really the issue here at all. Well no, that's not accurate. I don't think suppressing the rights of the good men and women of our country to self-defense is a good practice. No matter how much we restrict guns, bad guys will still get guns. Just because it's illegal doesn't mean someone who wants a gun can't get one. In fact, gun control in effect does the opposite of protect our people. It takes away their ability to properly defend themselves from maniacs like this.
Just look at states who have incredibly high gun restrictions. Notice how they have incredibly high amounts of gun related crimes compared to states with less restrictions? I think that alone says plenty about how much good gun control does. Am I saying gun control caused the Orlando shooting? No, but it was probably a contributing factor to the size of this tragedy.
If everyone in a room has a gun, do you think anyone would pull theirs on another person? Not likely, because they know that they'd have a barrel pointed right at them. If they're still crazy enough to pull the trigger, they wouldn't get very many shots off before they themselves are put down.
tl;dr gun control sucks and hurts our nation overall.