Religious ambiguity

Talking about the religion,
I have always questioned myself why the feel doesn't come upon me when I encountered with other religions praying,Marrying and celebrating.
I have found out it within myself that,growing up in a religiously bounded family whose grandfather is a renowned 'Pandit' in the town I have always been listening to the 'Om nama shivaye' 'Ram Sita' 'Swasthani' Conciously or sub conciously I've been listening these since my childhood.
If I had been listening 'Allah' or 'Jingle bell' from my childhood and celebrated those festival I'd be happy and anticipate in those cultures and tradions,
This is why most of us finds boring and unentertaining about some other religions.
But make no mistake the theme of the every religion in the Earth is same.