what it's saying is, seminal fluid extracted from the scarf of one victim matched one of the suspects ancestors 99.5% and 100%, respectively.
one very major suspect was prince albert. because of the royal family it was hard to investigate.
now we know it had nothing to do with them.
no conspiracy theory.
What proof is there that the DNA belongs to Jack the Ripper? None.
Jack the Rippers identity is still just a guess, that scarf was purchased by the researcher at an auction and has been owned and handled by hundreds of different people.
So in conclusion, Jack the Ripper MIGHT be identified, maybe, but its very likely that it could have been someone else too since there is no actual proof of anything.
Most likely the Jew who is being fingered in this case, was just a client. You have to remember that the women who being killed were women that accepted money for sex, many of them had multiple partners each day and anyone of them could have left that DNA on that scarf. So most likely the DNA evidence has identified one of the prostitutes customers.