Why Atheism?

Why did a country that have their 5000 years of divine culture became an Atheism country? It might be hard to understand if you don't know the history of communist party. People in China used to believe in God, since the stories passed on by our ancestors taught us to respect God because God is what control everything, including the rain, the sun and the land. When people have a high moral standard, everything goes well. People believe that when you do good things, good thing will happen to you; when you do bad things, then bad things will goes back to you. This rooted deeply inside people's heart until the recent century.
Chinese people was taught to believe in Atheism  these days, so that people won't care about what they do. They focus only on money and ignore the moral standard a human should have. When this kind of thoughts became the only thing they believe in , they forgot all the other things beside interest. They are afraid of nothing.
It destroys people and a nation.