No, that's not what I am saying. I am far from saying that. 
I have children of my own. 
The issue you are talking about has nothing to do with the use of weapons or not. 
How can a baby defend himself, alone,  with an adult that is abusing him? What would a weapon be of any use in this horrible outrageous situation? 

 What of people who live where animals may be a threat? Shouldnt be able to defend against a bear or wolf? What of hunting? Should people not be allowed to eat meat? What of things that can be weapons used in growing crops? Anything can be a weapon. Fists can be weapons. Ban em?