Our culture, our mores, our laws are based on religion.
A society that moves away from religion weakens at its core.
Those needing some sort of structure, cause, renewal then seek it elsewhere.
This is why in a place like the UK - once the mightest empire on earth - is a hollowed out paper mache facsimile of itself where moslems are taking over - not only via immigration, but by conversion.
And for the record, I haven't been to a real church mass since 1985. So I ain't proselytizing,,,