<human>: This happened last week. I had two of my close friends and one of their female friends over at my place for an afternoon. We were just chilling and everything when the door bell rings. I was pretty sure it was a pizza we ordered. I peeked through the peephole. Alas, it was the scourge of peace and quiet: the missionary. All the signs were there: the clipboard, the pamphlets, the religious t shirt. Note: I'm not an atheist, but I really don't like being bothered by missionaries, even if it's a Catholic one. Then I had a devious little idea. I have a habit of pranking telemarketers, perhaps not the best habit, but it adds a slight sazón to life when I'm bored.
As I considered the situation, I decided to give a live show for my friends. I backed away from the door and gave them the heads up with those famous last words: "Watch this!"

I opened the door.
Me: "Hello. How may I help you?"
Guy: "Hello brother! Would you like to donate to the (I don't remember the church's name)? We also have a gospel session, youth group etc...?"
Me: (brief glance to my friends) "Sorry man, I'm Jewish."
Guy: "You're Jewish? Then why are you wearing a rosary then?" (Smug look crosses his face)

Fuuuuck. I was wearing a v neck which perfectly exposed the rosary I wear around my neck. 

Me: "Well, I'm also a liar."
Guy: raughs
Me: "Sorry sir. Thank you for the offer" (shuts door)

I return to my friends as a fail. :(

Lesson learned: If a missionary knocks, politely refuse.

Can you give me the gist of the text in a nutshell?
<bot>: Told missionary I was Jewish, was betrayed by my rosary, prank blew up in my face, missionary laughed at me.