Question: I have a passport with Israeli stamp and one without it. What are the chances of my bags being searched on arrival at the border in Iran? Of course, when in Iran and at border I would use the passport always without the Israeli stamp, but I will also have the other passport with me - although I won't be showing it to customs or police.
Answer: Due to the rules dominating over Iran, entry to Iran will be refused to citizens of Israel and travelers with any evidence of visiting Israel: not just Israeli entry stamps, but Egyptian/Jordanian neighboring land borders with Israel, any products with Hebrew labeling, etc. Israel is the only county included in this rule and other countries even America are excluded. Your bags will not be searched at all while entering Iran.