Sophie-Renee,
Unless someone like Randall DeWitt Simons has crime-scene evidence in the form of photographs, then the intruder theory is dead in the water, it lacks forensic evidence. There is zero forensic evidence linking to anyone outside the Ramsey house.
In the early years of the case the intruder theory was assumed wisdom, over the years most of the evidence has been parsed showing there was no Foreign Faction, i.e. no multiple dna samples at the crime-scene, and that the killer needed inside knowledge, e.g. where the size-12's were kept, where Burke's longjohns were, etc. Not to forget that there was a wine-cellar in the basement.
So the case is now viewed through the prism of some Ramsey Did It.
While I am not exactly an advocate of the IDI theory- I am just considering all the oddities. Because to be fair to the Ramseys, there may be no forensic evidence for an intruder- but neither was there forensic evidence implicating the Ramseys. They did not find that any of their DNA matches any of the dna in question. That said, this again could be because nobody's dna will be matched if what is being considered is a mixed dna profile. I think the whole Helgoth and Oliva thing is complete tosh because of reasons I won't get into here but IF there was an intruder the things I have mentioned seem actually more likely and the people at the party and that neighbour are not exactly the most common names to occur when looking at intruder theory- it has been based on the 2 mentioned above, that the Ramsey's as far as we know had no connection to and not the kind of people who would have been living in their neighbourhood or in their social circle.
I would agree with the foreign faction part. I think that is ridiculous. IF someone took her, and yes it is a big IF they were trying to lead investigators down the wrong path by making it sound political and like they were some sort of terrorist group. Why would you target the Ramseys? They may have had money, but why not a political figure? I do think however that some behaviour was very strange, and if the Ramseys did it, I am not 100 per cent sure there weren't more people involved. The neighbour theory is a possibility is all- but I do think whoever did this to JonBenet, it escalated from that party and there was perhaps more than just a for example- Burke got into a fight with his sister killed her with a blow to the head- there was a build up . Another thought that occurred to me was what if Fleet had threatened to call the police when he saw Burke perhaps hurt JonBenet in order to scare him? Maybe he witnessed something and the Ramseys begged him to put the phone down and just let it go? Maybe we will never know.