I totally agree with you about Andrea Yates and don't understand people who just want to see her punished when clearly she was ill. It is likely the same kind of scenario in this case. It seems like many were aware that she had gone a bit nuts, but didn't know the signs that she was becoming psychotic and what implications that might have or what to do about it.
Having lived with a psychotic, I damn wish I'd known her.
The giving stuff away, moving furniture, obsessive thinking, religious mania, paranoia.... all the signs were there that she was heading for a big blow-out. But in my experience, psychotics aren't "raving mad" all the time, they can seem calm and rational at moments, they can gather themselves and seem fairly normal.. for a time... so I can see how even people close to her might not get how close to the brink she was. My mother could smile and charm anyone, look completely harmless, and then she'd come home, stress out and blow out, and I'd be the target of it all.