From your link (emphasis mine):
"The "Dead Sea Scrolls" comprise roughly 900 documents, including texts from the
Hebrew Bible, discovered between 1947 and 1956 in eleven caves in and around the Wadi Qumran (near the ruins of the ancient settlement of Khirbet Qumran, on the northwest shore of the Dead Sea) in the West Bank.
The texts are of great religious and historical significance, as they include practically the only known surviving copies of Biblical documents made before 100 AD, and preserve evidence of considerable diversity of belief and practice within late Second Temple Judaism."
They are historical documents in that they document religion and are very old. But they are not historical evidence as far as, "these people were alive, this happened, etc". Key word in there is: Bible.
From a different link (below, emphasis mine):
"It contains parts of the Ten Commandments from Exodus chapter 20, along with some verses from Deuteronomy chapters 5 and 6. So this was not a regular Bible manuscript but a mixed text with a special purpose.
It was evidently part of an instructional collection to remind a Jew of his duty to God."
Papyrus Nash
No doubt this is a significant historical document in that it is so old. But let's say you have a copy of the ten commandments framed and hanging on your wall at home. Fast forward 2,000 years - what sort of historical evidence is that when it is found? It is significant because it is old, or does it prove something other than someone in that era believed in the bible?
I'm not trying to dismiss the importance of these documents to your faith, but they don't really point to anything except "people in this era were Jewish/Christian". They don't document "The Great Flood" or the "Rising of Jesus" or "The Last Supper" or any of the important events in the bible which you (collective you) claim actually happened. And before you bring up the shroud of Turin, there is so much controversy over it's authenticity that there is no way we can debate it here and reach a reasonable conclusion.
