Paranoia
Paranoia indeed. Israel is a free country. Thousands of tourists visit both Israel and Iran (although Iran will not allow you to enter if you have evidence of a visit to Israel) and Israel is well aware of this fact. Israel really truly honestly doesn't care where you have been, as long as you were there as a tourist, and will be visiting Israel as a tourist, and have no political agenda or intent to stir up trouble. Hours of questioning? Unless you were participating in a Hezbollah training camp or similar, you have absolutely nothing to worry about.
This forum is full of reports of people who entered Israel with passports crammed full of stamps from Iran, Syria, Libya, you name it, and they weren't subjected to the third degree.
Get a new passport if you want to, but not because of any nonsense about the Mossad. How on earth would they have tabs on you if you have never been to Israel (or even if you have???).
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