Earlier quoted context omitted.
My understanding is that the chronology of all eyewitness accounts for the missile have been after the airframe was known to have broken up, meaning that they were most likely seeing large sections of the burning fuselage. Are there other eyewitness accounts that don’t match that, or are you saying that the official chronology is itself suspect?
Eyewitness accounts are unreliable and may be completely mistaken. But nevertheless, they are evidence. 'Evidence' doesn't imply 'proof'.
In other words: if nothing has changed about the eyewitness accounts in the last 26 years, then there is no new reason to doubt the (overwhelmingly likely) explanation for them.