A number of years ago...

A number of years ago, in Belfast, a man was accosted by some ruffians.
"Catholic or Protestant?" he was queried in a threatening manner.
Not knowing which group had stopped him, the man cleverly replied:
"Atheist!"
The head of the toughs moved in closer and snarled:
"Yes, but which God don't you believe in, the Catholic or the Protestant one?"