Is Mormonism based on the literary work of “View of the Hebrews 1825 by Ethan Smith”?

I don't think so. Mormonism is based off the teachings of Joesph Smith Jr, who was sort of like a prophet to his people. He wrote the Book of Mormon after having a chat with god and that's what Mormonism is based on, of course, including the Bible and the Doctrine and Covenants. Yeah, that happened in the early 1820s.