I have explained this to you many times. Have you not been paying attention?
A person can write a prophecy that is filled with vague language so it can be interpreted to mean anything. It's easy to twist the prophecy to fit later events. That doesn't prove that the later events were what the original writer was talking about.
Someone can write a prophecy AFTER the events that claim to have fulfilled it, and then claim that the prophecy was written before. It's like me writing on a piece of paper that Obama would be the first black president, and then claiming I found it in a collection of my school work from the 1990s.
Someone can find an old prophecy and then make up an event to make it seem like the prophecy was fulfilled, even if the fulfilling event never happened. Like if I found an old prophecy that said a woman would win the lotto twice in one month, then I say, "Oh yeah, this predicted the time when I won the lotto twice in a month," even if I'd never won the lotto at all.