A few things
1) The usage of DNA is testing to see if the bodies found in the tombs are related to each other, husband, wife, child. DNA is not being used to determine identity.
2) Given the fact that it was not until the Council of Nicea in 390(?) AD, that it was decided by the powers-that-be within the church that
a - Jesus was the only son of Mary and Joseph, casting his 3 brothers and 2 sisters forever into obscurity
b - "Immaculate Conception" was unknown until 390 years AFTER the fact.
c - Mary became the "Virgin Eternal", signifying that Mary did not have any more children after Jesus (contrary to all evidence otherwise), and placing a barrier between Jesus and his own blood brother Judas, yes, THAT Judas.
3) The Bible (New Testament) was written over a period of approximately 500 years, thus relegating "eye-witness facts" to the realm of "hearsay". Read the various passages to do with the Ressurection. Why do none of them agree on exactly what happened, and who was there when it supposedly did?
Mumbo-Jumbo BS about "God working in mysterious ways" is just a lame cop-out.