Compare these two unfortunate news stories with these two. In the first two stories, an innocent person is dead because of murderous scum. In the second two, the intended victims are alive because they were armed. The bad guys in the latter two stories didn't have guns on them, yet it was not lack of guns in the hands of the perpetrators that kept the victims safe, it was guns in their own hands.
I read those links and I see the uncle trying to make sense of why these scum shot his niece. There's no making sense of it. He says, "They just could have took what they wanted and left and not done that." Yes, they could have, and they chose to shoot her.
Like Breda said, "I'm not gonna be someone's meat....It's not gonna be my story."
Putting aside statistical argument, the Constitution, defense against government tyranny and all the other reasons we have for defending the 2nd Amendment as vociferously as we do, I think this one is the most plainly grounded in reality.
Why do I own a gun? Because if I can help it I do not ever want to be "someone's meat" like the victims in those first two links.
As Mal so succinctly put it, "Someone ever tries to kill you, you try to kill 'em right back." Indeed.