Well to begin with it would be extremely easy to prove that all humans are "sinners" according to the Bible. The Bible has made it impossible for humans not to be "sinners". Even if a person could somehow get out from under the accusations that they have actually committed any sinful acts, they would still be "sinners" by original sin.
In fact, the churches had people bringing in their babies to be baptized precisely because it was claimed that we are born with original sin.
It's a major goal of this religion to demand that everyone is a sinner. So it wouldn't be the slightest bit surprising that based upon the Bible's definition of sin, all men are sinners. This is the way the cult was designed to be in the first place.
No one escapes condemnation, not even newly born babies.
As far as God having DNA goes, that would violate the idea that God is "spiritual" and not material. If God has DNA then God must also have need of proteins biology and the whole biological shebang.
So claiming that we have God's DNA is utterly absurd.
That would require that God is PHYSICAL and BIOLOGICAL just like us.
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Moreover, I can prove just the opposite: From the Biblical Stories.
In Genesis it is said that God created for Adam a helpmate named Eve. But Eve turned out to be an immoral woman who disobeyed God and brought down the whole of the human race with her fall from grace.
However, God could have just as easily created for Adam a helpmate like Mother Mary. And then there would have never been any fall from grace.
Therefore if DNA determines the person, and God created for Adam an immoral bimbo that would be entirely God's fault, and not the fault of humanity.
So this violates the "fall from grace" as being anything short of God's own design.
And that would be an extremely untrustworthy and immoral God.
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The whole picture fails and cannot be made to work no matter what.
The only obvious truth is that these ancient superstitious rumors are just that. Superstitious rumors. Made up by not-so-intelligent men. Immoral male-chauvinistic men to boot.
There is nothing moral about this religious picture. Even if true, the Biblical God would be as immoral as the Satan character in this religion. He would be totally untrustworthy and devious.