“I have direct and personal knowledge of this. There was an American monk (convert) who adopted the belief of a monk on Mount Athos regarding receiving of converts who had been previously baptized outside the Orthodox Church. He held that their baptisim was invalid. The American monk was “rebaptized” on Athos; he was spiritual father to a convert priest who was “rebaptized” and began rebaptizing his parish”
We Greeks have a name for this, “Crazy convert disease!”
It isn’t limited to the Greeks.
We Lutherans have a long tradition of arguing with anyone, but not listening to close to the new guy.