The Dead Sea scrolls date, as far as can be determined, from 150 ~ BC to 70 AD. Some were written begore Jesus lived, some during his lifetime and some after. That doesn't help prove your point at all. I don't question the religion called "Christianity" exists, just that Jesus had nothing to do with founding it. But many things the "New" Testament records him saying are true and many other things he said were twisted by the early pagan Church to suit the narrative the Church wanted its followers to believe.