There are still a lot of people in Europe and the US who think it sounds more plausible that governments, the UN, and lots of international news organisations are so antisemitic that they'd fabricate a genocide in order to make people dislike Israel than it is that Israel might perpetrate a genocide. Part of that is because Israel's actions, both direct and indirect, both intentionally and unintentionally, have stoked lots of antisemitism, and that's added onto pre-existing shamefully high levels of antisemitism in lots of the world, then the perception of that has been amplified to ensure that jews worldwide are scared. If you see a scary amount of antisemitism everyday, and you're aware that the Nazis made up outlandish lies and used them to convince most Germans to allow the holocaust, it might seem pretty plausible that modern antisemites would run a misinformation campaign to convince people that Israel was perpetrating a genocide when it was really fighting a purely defensive and just war. Once you have that impression, it's going to be pretty difficult to convince you that any single piece of evidence of genocide wasn't fabricated.

There's not an easy way to reconcile the situation when a significant fraction of a population has been duped like this.