I have had the experience lately, where a person who inspired hate within me has been showing up in my dreams.
When I see her in the dreamspace, she is a shiny blob of love that truly wants forgiveness.
I know that the person who walks around has this within her, and as you say, she has just forgotten who she is.
Letting go of our hatred of those who are basically lost children is important.
It's not easy, but I think it's really important.