The holy men make claims but they are not the claim. That is not even logical.
The claims of the Messengers are in scriptures that were attributed to them or scriptures that they wrote.
Where else would the claims be, posted on the bulletin board at the corner store?
The Messengers of God make claims and they present evidence that supports their claims.
For example, the claims of Baha’u’llah and the evidence that supports the claims of Baha’u’llah are in this post:
Questions for knowledgeable Bahai / followers of Baha'u'llah
Good point. No, I don't know. I think religious people believe for different reasons since people are all different.