I scanned the article but couldn't bear to read the whole thing. I did see where Theron's mother shot her father to death but that doesn't justify trying to get EVERY BODY to get rid of guns. There may be a lot more to that story. She may have saved her life and the life of her daughter by shooting him. Some people that get shot get shot for good reason. If she chooses not to keep gun that is her privilege and more power to her. But she has no right or reason to try to influence others.
That said I totally dismiss all those hollywood types, yes, even the good looking ones, when it comes to opinions and attitudes on social or political issues. None of them live in the real world. None of them understand how the world really works and are spoiled and pampered past the point of having a proper perspective, and most of them have a head full of bad wiring due to drugs, alcohol, or delusions of grandeur.
I don't spend any time thinking about or caring what any of them think, do, or say.