Or we can just say that Sotha didn't know about it or that anything could fit in here and just speculate? But speculate is fun.
Indeed so.
He isn't just a strange, inhuman robot (Sotha Sil) but rather, he realy wanted to believe in a peace. When it shattered he knew he had an obligation to fix it, something he felt he had a hand in bringing about. He did it by finding out how to become a god of his people and to try to prevent this from ever happening again, but he lost confidence in his people instead when he gained real knowlege and realised that he coudn't change nature. In this sense he repeated the same mistake Nerevar made when he tried to hard to fix what does not, or cannot be fixed. That's my theory.
Because, like Nerevar, he
wanted to believe, it made him feel young again among other things. I like to piece together a character I can relate to in some way. I don't know if that is realy why, I'm not so presumptive, but that is what makes sense in the context and makes good character study. This is the nature of a tinkerer.