Room 5 in Heaven

A man arrives at the gates of Heaven.
He was asked, "Religion?"
"Hindu" the man says.
He was told, "Go to Room 3, but be very quiet as you pass Room 5."

Another man arrives at the gates of Heaven.
"Religion?"
"Buddhist"
"Go to Room 4, but be very quiet as you pass Room 5."

A third man arrives at the gates.
"Religion?"
"Christian"
"Go to Room 9, but be very quiet as you pass Room 5."

A fourth man arrives at the gates.
"Religion?"
"Jewish."
"Go to Room 7, but be very quiet as you pass Room 5."

The Jew asked, "I can understand there being different rooms for
different religions, but why must we all be quiet when we pass Room
5?"

"Well, the Muslims are all in Room 5 and they think that they're the
only ones here!"