That is really awful. There really is no excuse for treating your child that way or not being there for them. That I agree with 100%. I am in NO WAY saying that these people are good parents.
but.. just saying. that they may not be as happy as they seem. Ashamed, sad, regretful, isn't always as obvious as it looks.
They totally COULD be soul-less heartless people who don't care that their daughter took her life.. but, that isn't for certain. They could really feel horrible for how they treated her while she was alive, so horrible in fact that they are unable to even deal with the guilt surrounding her death.
As Renee said, it's hard for me to even THINK that these people are honestly happy.. Parents love their kids, they raised her, they lived with her, they took care of her as a baby and loved her when she was little even if they didn't "love" her choices as an adult. I'm just saying..there is a chance that these people, as awful as they were, do regret and are in A LOT of pain.