You're trying to find a contrived scientific notion of trinitarianism, which is a belief that is built out of the long history of Judaism and Christianity. How does this make any sense? If you don't believe Jesus was an actual person, or that God the Father gave stone tablets to Moses, what does the trinity even mean to you? And if you do believe in these things, how is "DNA" a satisfying explanation for the Father who parted the sea for His people to cross it?
How would you interpret the sacrifice of Jesus/God the Son to save humanity (God sacrificing Himself to save humanity) in this DNA based framework?
True… the moment you do not accept that Jesus Christ is the walking and breathing incarnation of God is the moment you completely deny Christianity within the scope of the solidified Christian belief system. It is more realistic for the Christian to accept Jesus Christ was an alien, the Holy Ghost is a tractor beam, and God is the flying purple people eater at that point.
The answer to "who are you trying to fool?" is in every case the same: himself, and anybody along for the ride. The usual hope is that, even when he cannot fool himself, he might fool (i.e., "save") somebody else.
Easy. The Son has to die, meaning every human individual must die because ONLY that way the evolution of DNA can proceed. DNA can "go to heaven", meaning beyond the death of the individual, for future generations to live, and to repeat the same cycle.
DNA has a mechanism for aging, meaning we really die because of it, not in spite of it. The Aging has been built in (= has evolved as a trait) because it allows the species to evolve when older generations leave room for newer ones.
How would you interpret the sacrifice of Jesus/God the Son to save humanity (God sacrificing Himself to save humanity) in this DNA based framework?