What I see is the following:
Planet Earth was a suitable place to cultivate life
Aliens from other civilizations intervened to achieve the project of accelerating natural selection.
Two major groups have shown great interest in the races available on this planet, as a repository and a creation project.
The aim of the project for the human aliens is an incomplete experiment that occurred in the midst of a conflict / and is not yet complete.Have been manipulated
It appeared that the reptiles evolved in a way that exceeded the human being, and the alien humans orchestrated a devastating event on the planet, where the aim was to show that the other experiment conducted by the reptilian race was affected by a natural disaster.
Many reptiles still remember this event, as it was akin to a mass slaughter or the Holocaust.
Most of the problems that have suspended our development are due to a great bloody conflict and war between the cosmic races.