Do you believe in Thor or Vishnu? No? Then I just donβt believe one more God!
"Yeah but my god is real"
"Okay and thor was real to the vikings"
"It's different"
"It's really not."
I use that to an extent. Do you believe in Thor, Zeus, etc. well I believe in one less god than you do. They generally go away after that.
Religious people are right about all Gods but one......
Even the religious are Atheists in regards to other religions.
Perfectly simple explanation. It avoids a lot of nonsense. If he gets it his next question is likely to be "who do you worship then?" This always got me because I never saw worship in the church when I was there. Just closing your eyes and asking god for stuff, saying strange words, or moaning. Is that worship?
Do you believe in the tooth fairy? Do you believe in Santa Claus! Of course not, I am not still a child. Okay, why then do you still believe in god ?