Because some people have never been, or haven’t been given the chance to be.
They do not have any idea of how to practice what they never received. All they know was probably.
It is what they carry into the society when never had any chance to learn it differently. Even if the chances would be there. When one is older and can make their own choices.
It’s hard for them to relate and see or feel the differences between love and hate.
How do you recognize them? Is by their choices of solving problems. ………