Umm they claim to "have used DNA" to "prove" their claims.
So can anyone explain to us just how they got a DNA sample to match to Jesus Christ's DNA?
There are only two historical sources that spring to mind which might have Christ's DNA - first is the Shroud of Turin; however the authenticity of that is still a matter of debate. The second is a relic which I believe has been lost in the mists of time, the "True Cross" - the cross upon which Christ was nailed. This was a holy symbol for Byzantine emperors, but I believe was lost when the Turks took over the Byzantine empire.
Given this, the idea that they somehow have his DNA isolated is laughable at best.
Regards, Ivan