Something awful happens like the hospital attack
People use it in social cannons to ferment hatred, posting, reposting, using it as evidence for how bad the IDF are. They amplify how terrible it was, use hamas casualty numbers, and ferment hatred
In this instance, that hate led to mass social disorder, attacks on embassies, and the cancellation of diplomacy as a result of that disorder. It without doubt changed the narrative, because if you’d have waited just 12 hours, 95% of the people wouldn’t have used that media, which was particularly egregious.
new evidence comes to light, people say “well ok, but look at this next incident, Israel are still bad” - first incident is now unimport as it doesn’t drive home the view . Or they double down and continue
the next incident is the same, only useful to them insofar that it backs up a point they want to make.