Propaganda is just a form of marketing, with 20th Century propaganda techniques being specifically built and refined by marketing people (Edward Bernays for one). And to create successful marketing you need a sense of who your audience is and what they want. You create market personas that are representative for certain demographics, you do market research, and so on.

Israeli's have been so lost in the sauce of racial/religious supremacism and so cloisted by their fear and hatred for anyone outside it that they've completely lost touch with any sense of who other people are and what they want. You can't understand people well enough to market to them if you think they're all untermenschen and animals who have to be culled. You can't simultaneously understand the actual positions of people you've gaslit yourself into believing are actually bloodthirsty monsters whose entire existence is about destroying you.

This why Israel's actually somewhat successful propaganda over the last 50 years has nearly all come not from Israel and Israeli's themselves, but from an ideological army of white, non Jewish Zionists. Like you might outsource a marketing to a marketing agency, Israel outsourced the majority of it's effective propaganda to a class of people who could be bought and either personally benefit from Israel's position in the middle east or have their own natural supremacist tendencies (Nazis, white supremacists, a way to do 'polite' white supremacy in European centerist politics etc).

The reason that outsourced propaganda from these Zionist outgroups has started to fail is a threefold sequence:

Israeli's got insulated enough that they wouldn't shut the fuck up we with their delusional supremacist/victim shit.
soft power background noise marketing doesn't work when everyone on the planet is watching you commit the worst atrocities since the Holocaust on their screens every day.
When Zionist outgroups couldn't control the narrative they had to crack down on anyone not buying the messaging. That's not marketing but repression at that point. 'What an enlightened and tolerant country we are to try and make sure the horrors of the Holocaust never happen again' is a good marketing strategy. 'We're going to jail your grandma and kids unless you bow before a state ideology that clearly despises you' is not, as it turns out.

(I'm not even going to bother with why IranContrapoints couldn't/wouldn't grasp what that reply very clearly meant 🙄)