Compared to a group of Ancient Gods scared out of their wits by a passing Star River Giant Beast and deceived into doing all sorts of foolish things, Sos found it easier to accept the scenario where the World Tree was felled by a group of evil and foolish Ancient Gods due to their own ambitions.
In any case, the outcome was the same.
The World Tree was destroyed, the Ancient Gods were all dead, the Giant Beast would not return, leaving Sos with nothing but a desolate apocalypse that needed continual repairs.
As for taking revenge on the descendants left by those evil Stone Race People...
The descendants of the Stone Race People were also all dead, and Sos didn't even think those Stone Race People did anything wrong.
