Is it normal to feel extremely violent if my child is seriously hurt?

My father and I just had a discussion of the Rottweiler that disfigured a 4 year-old boy's face and he'll required several surgeries. Yet, the Rottweiler wasn't euthanized yet.

I'm quite in shock that my answer was more violent than my father's. Meanwhile he would've shot that dog if that was my son getting attacked, my response was that I would've stabbed it to death with a knife. I'm against violence myself but a scene of my son getting hurt badly would be my limit. If a dog attack my child, disfigure him (destroying his life) and people still kept it alive, I would find myself totally enrage right there like never before and finish it off myself. And I'm not a violent person. I don't even believe in hitting others.

Is it normal to feel extremely violent if my child is seriously hurt?
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