How should I judge someone who claims a deity has descended but insults people casually?

First consider whether the words and actions show virtue and wisdom, and ask for reasons. You do not need spiritual perception first. As I understand it, even a deity’s anger serves to teach and help someone understand what needs changing. It is not lashing out at or humiliating people because of a bad mood.

A news story described a daughter-in-law being told she deserved a beating for not giving birth to a son, by someone claiming a deity had descended. We discussed how that reasoning conflicted with our understanding of divine virtue. Whether anyone had arranged it in advance could not be personally confirmed from the news; that remained speculation. But believers could still ask: Why say that? What is the reasoning?

Clothes, fans and ways of speaking can all be imitated. Listen instead for wisdom in the words and compassion in the conduct. Ji Gong and the Third Prince can sometimes be lively or eccentric, yet their teaching is still discernible. A solemn appearance or a childlike voice alone does not establish which deity is present.