Effective propaganda, when truth is not on its side, does not simply ignore the truth. There's an ICC arrest warrant out for Netanyahu for crimes against humanity, war crimes, and so forth. Never saying genocide and ignoring all allegations would be a red flag to the point of absurdity. You'd never convince anybody that wasn't already completely convinced.
So the way that real propaganda works is by taking some issue people generally feel a way about, expressing some empathy towards that, and then working to shift that person's perspective. For instance here [1] is the first article you linked: "UN rights expert accuses Israel of acts of genocide". It not only spends much of the article softly trying to undermine these claims, but even leans on one of the most classical propaganda techniques - appeals to emotion. This is a quote from that article:
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Not surprisingly, Israeli diplomats are angry [at the claims]. Its ambassador to the UN in Geneva, Meirav Eilon Shahar, described the report as "an obscene inversion of reality", and accused Ms Albanese of questioning Israel's right to exist. Many Israelis, too, are likely to be shocked. And the suggestion of genocide, towards a state which was founded as a direct result of Nazi Germany's genocide of Jews, will cause deep offence.
In the wake of 7 October attack, and the fact that so many Israeli families are still waiting for news of loved ones taken hostage, hearing such outspoken condemnation is hard. Noam Peri, whose father Chaim was taken hostage, also travelled to Geneva. Her focus, naturally, is that her father not be forgotten.
"My father was kidnapped from his own home," she said. "He's an 80-year-old person that was sitting in his home with my mother, and he was brutally taken from there, and has essentially disappeared since. He has no communication, with no-one in the world."
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[1] - https://www.bbc.com/news/world-middle-east-68667556