No, it wasn't the gun

that killed those innocent people in Texas. It was the person behind the gun.
I think we all know that.  However to use that as an argument for gun ownership is ridiculous. 
Recently I was startled by the daughter of a late friend showing pictures of her daughter, barely in her teens, with a gun in her hands. Father and daughter had been out shooting.
This family are devout Christians. I have no doubt at all they do their best to live by Christian principles and that they do their utmost to support their family, their neighbours and the wider community. Still, they go shooting.
After a little while I came to the conclusion that it is part of the culture, a gun culture. That "right" to "bear arms" is part of their lives. 
For me there is a vast difference between killing just enough to eat or otherwise survive and killing for the "fun" of it.  I will eat meat but we eat very little of it and, if it was not for the Senior Cat, I would quite happily go without it. 
But, other people see this differently. They see it as a "sport" and a "challenge".  It really is part of their lifestyle and their culture.
And that is what is going to be so hard to change.  
I think, indeed know, that I am fortunate to live in a country where no such "right" exists. That doesn't mean that we won't ever have a mass shooting or that people don't get killed by guns. For us though the difference is that a mass shooting brought about increased gun control and when a mass shooting occurs in the United States and we hear about it then the vast majority of us believe our gun laws are good - and could perhaps even be more stringent. 
And yes, the latest appalling and terrifying act of mass murder in the United States was almost certainly a mental health issue as well. The sad thing is that here the individual would have found it impossible to legally own a gun and much harder to obtain one illegally. 
How do you change a belief that gun ownership is a right? It's an enormous responsibility.