- simply proving wilayat is not enough to prove the 12er POV this concept evolved over time and has not been excluive to 12er sect
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With the passage of time concepts such as Wilayat will be understood much more clearly, Insha Allah.
Acutally this might interest some people here, on YouTube Radio channel "Islam and Friends" there is going to be a discussion between two teams of Shia/Sunni. So keep looking if you are interested.