From what is known the people we call Neanderthal were intelligent and were empathetic. They made seashell jewellery and they buried their dead covered in flowers. I'd be proud to have a high percentage.
Will you send a child to prison for crimes committed by their parents if the parents ended up dead by the time found guilty?
Human brains seem wired to have strong feelings about their kin or tribe. So, yes, I would think having neutral feelings about your parents would be a hard thing to understand for most people.