It's a stretch to suggest that people will abandon their faith because they are angry with their Government.
Coming DIRECTLY from Iranians WHO LIVED THERE, they are told, "you WILL conduct yourself according to fundamental islam, and you WILL NOT practice or proselytize any other faith", but they have not been as successful forcing them all into mosques, which, as of late especially, are often mostly empty.
Persians are mostly secular as a rule, dating back to the early 20th century. No one suggested anyone abandoned their faith because they were angry with their government. In fact, much of the current rebellion is the result of radical islam being forced upon the general population. The mullahs use islam as both a reason and a tool to keep people in line.
But hey, ignore the massive number of Iranians you can find speaking out, because it suits your blinding hatred. I'm sure you know a lot more about Iran than actual Iranians who fled their home, often leaving family behind. They couldn't possibly know as much about Iran as you and Trudeau.