There’s the thought that genetic contamination is what caused God to wipe most of mankind off the earth in the flood.
And the thought that not being a genetically pure human renders people from being eligible to be saved, since Jesus died for mankind, not mutants.
You win the jackpot. Satan and his lackeys manipulated the human genome before Noah’s time through a forced breeding program. They “took” for themselves wives. The result was mutation. Goliath’s dad had six fingers on each hand and six toes on each foot. His sons were freaks. Giants. Their imaginings were only evil continuously. Noah was “perfect in his generations,” which is his ability to “generate.”. Noah’s genes were perfect which is why we all come from him and his 3 sons. I couldn’t repopulate the earth. Too much damage.
God killed everyone on earth except for the 8 people on the ark. Maybe billions of people, because the earth was in better shape and people had huge lifespans. Mutants, half angel, half human mutants began to fill the earth.
Satan and his army back then had time, a hundred years or more. When the Antichrist hits the ground he will have 7 years and then Lord Jesus will crush him. He can’t use the same breeding programs and the angels who were responsible for the genetic mutation program back then will be released. I assume they will use our tech to manipulate people within a few months. Or else. The devil knows his time is short.