It seems to me that the “rules” are arbitrary and generally change from article to article. For example, there recently was an article about a certain gvir’s generosity to Torah mosdos, and only a very few comments were posted, all sugar-coated positive, but I personally know of at least four comments that were not so positive that did not make the cut, all with no profanity, no hate, no anger, etc. Possibly there was a surge in angry hateful comments for this article that caused the moderators to just shut down the comments completely, and only a few earlier positive, non-loshon-hora posts were allowed
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