www.ismaili.net

If you are interested, I will send you a chapter of one of my books on the proofs for Imam Ismail's Imamah and a refutation of Twelver arguments. Since PMs don't work on this forum you can e-mail me at sayfadeen_ali@hotmail.com.

On the shari'ah side, the shari'ah itself was primarily a creation of ...

No, that's a different z. Nizar was the name of one of the Imams from the Israelite period. The root n-z-r with this root in Arabic means little, few, paucity, etc., and the name of the Imam is not derived from that. It's of Hebrew origin, like Imam Ismail.