Think back a couple thousand years.
Yeah, this guy is probably Jesus.
Oh, gotcha.
I assumed you were talking about some of the Chabad folks who are/were convinced the Rebbe is/was/might yet be the Messiah.
Rather extreme, and a good example of how a really, really, really good Rabbi can be mistaken for the Messiah by a people who are impatient.
(Heck, I was hopeful there for a bit.)