You might want to read those accounts of J. Smith closely (particulalry those from non Mormon sources). It is entirely plausible that Smith was shot by one of his ownn (either to fulfill a sick ‘prophecy’ or because of the chaos).
I have been to Nauvoo (visiting my mom in Quincy when she lived there and she wanted to see it.....she liked older architecture). It is well preserved but the story that the acholytes give you is so much fluff and stuff. There are small kernels of truth to it but on the whole it is a very jaded presentation. Preservation is well done
Thought so too. Interesting place re: US history which is about as far as I’d take it. I’ve read lots about Mormons and the books that the Tanner’s produced.