Forgery

In the researches of Gershom Schlem, Gerbern Oegema, and other serious academic scholars artifacts are one of the main issues. They base much of their theories on the physical evidence found in the field. Archaeological excavations have top priority and every new dig can jeopardize the whole concept.
The main artifacts in the research of the Star of David are very problematic: who knows if the seal found in Sidon is really Jewish, or if the Star of David in the Capernaum synagogue is not Pagan or Christian. From an article by Uzi Dahari I gained another question mark about this prominence of Archaeological evidence:
How can we be sure that these are not FORGERIES?
Uzi Dahari wrote in his article titled "Archaeological Forgeries" :
While visiting the excavation at Ein-Gedi, conducted by my friend Professor Hirschfeld of the Hebrew University, I saw that he was very excited and told me that a unique talisman with Jewish symbols had just been found.. I looked at it and told him I am sure it is a forgery. There were no Star of David symbols in use as a Jewish symbol in the late Roman and early Byzantine era…