For your information, I also took the same oath, but taking that oath is not justification to destroy life. Suppose the individual who breaks into your home is there to steal food for his family. Is it justifiable to "put him down" because he has threatened your way of life?
Welcome to the ranks of those whom I worry about.
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I love to hear gun owners talking about hypothetical shooting situations. Anyone wo has posted things like "I would shoot anybody in my house for any reason" or "Thats when you talk to your wife about getting the story straight" . Should you ever shoot anybody and a DA gets a hold of these posts there will be plenty of time for you guys to think about it.
I read articles everyday where people shooting in what they think are perfectly legitimate SD situations becoming the criminal when the charges are handed out.