Don't trust a moslem until you have seen existential proof.
So when someone comes to a Pastor or Priest requesting baptism, they’re supposed to “demand existential proof” first? Yeah, that will REALLY help spread the good news.
One interesting story that has been making the rounds for a little more than a year now are reports of middle-eastern Muslims, including some ISIS fighters, dreaming or having visions of “The Man in White”. They all identify this figure as Jesus and have spontaneously converted after these dreams and visions. Numbers range form the dozens, through the tens of thousands. Google “jesus appearing to muslims in dreams” — it makes for some interesting reading.
Don’t trust a mooselimb until....
it has rigor mortis.