To put it simply, let's make an analogy: the gods on the Faelun Continent are just like company bosses, with powerful divine powers as multinational corporations and weak divine powers as local chain stores. The so-called war of gods is quite similar to a business war, aiming to crush the opponent's company, assimilate it, and expand oneself.
Like the God of Murder, Sherrick, the Prince of Lies, even wrote himself the He-Man Scripture, which essentially states that Sherrick is the one and only True God, and all others are false gods. This is fundamentally the same as slandering your competitors in a business war, claiming their products are knockoffs, and only yours are the officially licensed genuine items.
However, Grand Judge Duanmu Huai's Tribunal is not like that, the Tribunal is more akin to a band of robbers. When your company opens, I just barge in, sweep up the fruits of your hard labor, and ultimately burn down your company... That's exactly what Duanmu Huai did to Rose.