Look if you believe J Smith was a prophet of God then let it be. It's your choice as it should be, but don't sit there and be offended when there's plenty of documention backing up the facts that the guy was a con artist and a fraud!
They can provide documentation of anything you want said.
Its the exact same thing regarding Joseph Smith.
There is much more to things that though.
Joseph Smith was killed 150 years ago. What did he leave and what has come of it?