Humans are all selfish, and demigods are no exception, harboring their own private desires.
Indeed, many past incidents have proven one thing: demigods, these powerful beings, are even more selfish than ordinary humans. And when they sense danger to themselves, they are willing to do anything to ensure their own survival.
If there had been no threat from Zhou Tian, perhaps that demigod would not have taken extreme measures. But now, having recognized Zhou Tian's strength and felt his threat, the demigod was naturally prepared to do anything to save himself.
It didn't matter whether the other demigods were friends or enemies; at this moment, as long as he could preserve his own life, the demigod wouldn't care about the fate of others. Even though seeking help from other demigods might not guarantee his survival, he would still grasp at any glimmer of hope, however slight.