I don't see that. "all this" started with the October 7th terror attack by Hamas (at Iran's behest). That was aimed to do 2 things, obviously just engage in a bloodlust, but also to provoke a reaction which would scupper Israel's accord, or whatever the word is - much improved relationship/prospective deal - with Saudi Arabia. It did both those things. The utterly brutal retort from Israel (war crimes, genocide, collective punishment, murdering and destruction..) was probably not what Iran expected, they probably didn't expect such horror, but ultimately they don't care.
Sure, Israel attacked the Damascus consulate, where Iranian liaisons with Hamas were holed up, and then we are where we are, with tit for tat attacks. In as much as you can draw a "starting point" or an "at the moment" window around hundreds of years of animosity, the October 7th date is IMO the starting point of the current appalling, bloodthirsty mess. Iran's has kind of let Israel off the hook to an extent, as well, because just as the world, or the democracies who sympathise and support Israel were utterly losing patience, they've re-invigorated that support/sympathy by launching hundreds of rockets and UAVs at Israel.
The leaders of Israel, Iran and Hamas are monsters.