What was the purpose of proclaiming those words to everyone on the Flameyellow Continent? It was very simple: they wanted everyone to resent Tianming. By pouring all the guilt onto him, they wanted everyone to isolate Tianming so he would suffer even greater pain. 

As sovereign of the Divine Moon Realm, Sovereign Xi knew very well how excruciating it was to be resented and abandoned by the people. This was a deadly approach capable of toppling any emperor. They were the ones doing the slaughtering, but they wanted the people to blame Tianming. Offending the divine moonrace could only bring such a catastrophe. But in fact, as part of the divine moonrace who were supposed to protect mortals, Sovereign Xi had instead threatened the lives of all of them in order to overcome her lifesbane, which was a serious dereliction of duty. Destroy Flameyellow to atone for his crimes, indeed! 

"What great power!" 

Countless people heard the imposing voice of the totems in the sky. Fortunately, they knew the truth and hadn’t been kept in the dark. Knowing what Tianming had done for them, they weren’t stupid...