Religion is neccessary for humans, because it helps us understand on where we came from, and who created us. Religion is the reason we have unity, it is our guide in all our actions. People preach us to be a person with responsibility. So religion is neccessary for all people.
So people who don't have religion are irresponsible and confused about our heritage? Cool story, bro.
I am witnessing quite the opposite in India. Here a lot of tribal people have converted to Christianity. They are losing their culture and getting too much westernized. Some of them can't even speak their languages now.