Since in today's world after the fusion, there have been faults and errors in the parts of human activity history, then these parts should be completely erased.
However, even if all the power of Impermanence is gathered, it still can't completely erase the parts of human activity history over the past tens or hundreds of millions of years. Not to mention that these parts also include their own existence, even if one doesn't touch the human history of the abnormal world, merely erasing the human history of the common world is an extremely vast project. I don't believe they can complete it all before Doomsday arrives.
Thus, the Evangelical Institute chose the simplest method—since the problem is human history, why not kill all humans?
