Well, these are all questions that make this case difficult to some. I am not certain that all this DNA came from the hands of someone. The panty DNA could be saliva but we just don't know. The perp could have taken his gloves off at somepoint. I don't know.
No matter what any of us believes, the case and the investigation was handled very poorly. There could have been fingerprints or handprints in the kitchen before it was cleaned up. The bottom line is the DNA is real and whether it be from a Ramsey friend, an investigator, or an intruder, they have to find the source to ever get justice for JBR. It belongs to a real person that existed at that time and RDI explanations mean nothing until that is proven at this point.
If the perp took off gloves when dressing her, surely he/she wasn't wearing them when tieing the garrot ON HER NECK.
All it would take for me to switch to a IDI is for the DNA match to the cord. IMO If they tested it, they only found RAMSEY DNA or we would have heard about it.
If they didn't test it, I have to ask WHY THE HECK NOT?