To the first underlined section, it's being responsible for your own safety. You have a right to defend your life by any means necessary if someone threatens it. Have you actually been in a dangerous situation before? It's not exactly the time to "try new stuff out".
I just don't understand the mentality, I'm not saying she didn't have the right to defend herself, her kids or her home, but there is such thing as excessive force.
I can just picture pro-gunners whooping and cheering that she shot someone, he could have easily died. I don't think burglary should be punishable by death, this isn't Judge Dredd where someone is judge, jury and executioner.
It's nice how you cherry pick facts, for every one of those you picked there is an opposite one where gun control has brought down gun homicides to single or double figures in the respective country, not five figures like the US.
To your other statement, I didn't cherry pick anything. Why don't you pick up a history book and study it. Or better yet, educate yourself about firearms beyond the movie and TV references you're making. I'm only trying to show you how illogical the argument is.