i hear ya. but someone killed her. an intruder looks unlikely. so does BR. JR is possible, but several of his early actions needlessly undermined the IDI theory (which the ransom note writer clearly wanted people to think, and which became the ramseys' defense): telling the police the doors were all locked, handing them the notepad with the practice note inside, admitting he was the one who had broken the window and it was months earlier. not what you'd expect if he was the murderer or even involved. also, this is admittedly subjective, but the officers on the scene thought he seemed rested in the morning, and that his reaction to finding JBR's body looked sincere.
PR on the other hand was wearing the same clothes as the night before, and iirc had her hair and makeup already done. more consistent with someone who had been up all night than someone who had slept, gotten up for an early flight, and then discovered a ransom note saying her daughter had been kidnapped. subjectively, she strikes me as far more likely than JR to make the laughable mistake of having a "small foreign faction" actually refer to itself as such. or to have nuanced views on american defense contractors ("we respect your business but not the country that it serves"). i lol trying to picture that coming from al qaeda, or shining path, or the IRA, etc. .... that's before we get to the handwriting and linguistic analysis, fiber evidence, etc., which IMO are not as strong as some people think, but do still add to the case against her.
as hard as it is to imagine, the fact is that parents murdering their children does happen. since becoming a parent, i've found it even harder to imagine violence against a child, but paradoxically easier to see how it happens. kids can be incredibly frustrating. and an adult that doesn't manage their stress well or control their actions can lose it and do the unthinkable. such an adult shouldn't be responsible for children, but they often are anyway. it was the end of a very long day, PR was up late packing for everyone for an early flight the next morning. she needed the kids to do as they're told and not create any problems. and then something happened that set her off. another bedwetting incident, some disobedience about going to bed. something. even with her identity wrapped up in her daughter, i can see an angry outburst that does more harm than intended. followed by an emotional, panicked, nonsensical coverup.
edit: all MOO