Nobody is minimising their fear. Of course it is genuine if they are from prominent families who supported the previous Shah or if they are still politically active in opposing the current regime. It happened in Iraq to supporters of Abdul Karim Qasim when he was overthrown by the Baathists and then it happened to Baathists when they fell. It happened in Libya to supporters of Gaddafi. It even happened to James II and his supporters after the Glorious Revolution. I would guess, and this is purely from reading your comments, that they would support the reinstatement of the Shah no matter what his political leanings. The question is though, is what the majority of Iranians want? If there is a massive second wave on the 17th February as is expected and the US intervene to help resulting in the overthrow of the current regime, then install Pahlavi as monarch against the wishes of the majority of Iranians, that would be a puppet dictator who would only be able to hang on to power by ruling with an iron fist supported by the US, as his father did. On the other hand, the average Iranian in Iran may be happy to see the reinstatement of the monarchy but personally, I doubt it.