Atheists, by definition, do not believe in the existence of gods or deities, and that includes not accepting the claims of specific religious figures or doctrines, such as Joseph Smith and Mormonism.
Atheists generally evaluate claims based on evidence, reason, and critical thinking. Extraordinary claims, such as visions involving historical figures like Joseph Smith and Albert Einstein proving a specific religion, would require compelling evidence to be considered seriously by atheists or skeptics. Personal experiences and visions are subjective and can vary greatly from person to person, so they are not typically considered as evidence in the same way that empirical data or logical arguments would be.
It's important to note that beliefs and interpretations of religious experiences can vary among individuals, and what might be meaningful to one person may not be persuasive to another. Atheists, like anyone else, may approach such claims with skepticism and seek empirical evidence and rational arguments before accepting them.