A possible problem with getting rid of religious influence is that doing so removes a huge chunck of native culture. Chip away at a nation's culture and you end up with anonymity. I don't feel that's a good thing. Frankly, I see little virtue in melting pots.
Insofar as Christianity goes, its Ten Golden Rules are pretty damned good, offend no-one and are very much biased towards an easy interrelationship of folks from different cultural heritages. They are primarily about respect for one another.