Augustus
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I do agree about the taqiyah part especially. It is indeed a Shia concept and given the fact that the Muslim world is overwhelmingly Sunni should give people the idea that this is not a prevalent idea overall. Given the antipathy between Sunni and Shia one can appreciate why the Shia felt a need to cloak their true beliefs around Sunni Muslims however.
It is also a Sunni concept, although more limited. Something pretty much identical exists in Judaism also.
To be honest something similar exists in most ethical codes: 'It's ok to lie under duress'.