Care to explain why a mother can carry a baby for 9 months watch them grow for a few years turns around and killes them? That is nothing but pure evil.
The same reason other species do the exact same thing, evil can be a natural occurrence, it's sad but true. It's a human flaw, violence/power/need to control/etc or as the other poster said simply a chemical imbalance in the brain, or maybe a learned behavior from growing up in an abusive home.
There's a difference between human nature and mother nature. Animals kill to survive why does a mother kill her child that she had nurtured for a few years? And don't give me that bullshit because of a chemical imbalance in the brain. That duck was killed long ago
No animals don't only kill to survive.
When I was a kid I worked at a pet store, about half the time hamsters had babies the mother would eat them, even with a full bowl of food.
No it wasn't killed long ago, or ever. I'm not saying that's the excuse every time, but often times it happens cuz the person is crazy, i.e. they have a chemical imbalance.