In Petunia's mind, "that awful boy" killed her sister. She didn't hate him because he was a wizard but because in her mind he took from her her only sister. Petunia loved Lily, no matter what she feigned.
I was disappointed about the portraits thing. I guess they are remnents of the past left behind to educate and better the future of tomorrow. Also, I'm glad the hp fact one cleared it up for me on that part!
Harry Potter feels I do like the post and Alan Rickman IS one of my favorite actors, but sorry, both of them said that JKR did not tell him his whole story line. Only a very very small thing about it, it was all Alan Rickman just being great