Raising children with sympathy, thoughtfulness, kindness
Children with sympathy, thoughtfulness, and kindness, can be developed only through humanly activities that require a lot of time. Nobody teaches you how to do that. Human children are said to grow mimicking people around them. I am sure you have heard of the story of a child who was raised by wolves. The child learned to walk with two arms and two legs just like human babies. Likewise, the child ate like wolves, and was not able to speak a human language, but learned to howl just like wolves. This proves that humans have the huge ability to learn.
If children did not grow the sympathy, thoughtfulness, and kindness, it would be sad and unfortunate, but it may be because of an environment without adults to look up to. It really is unfortunate for the children, but the adults around them might have lost such humanity.