You're assuming that the enmity caused by an event of almost seventy years ago would still be intact in the absence of other factors. It is possible, but it's a stretch. Justifying the reciprocal hatred with the formulas "they overthrew our democratic president"/ "they kept our people hostages" is convenient, but these are just formulas. A lot of stuff has happened since and there was plenty of time for normalization of relationships. The fate of the nuclear accord is telling: a move towards peace and normalization was sunk by the most unapologetically pro-Israel president in US history.