Deism is belief in god without the divine intervention. Rationally certain laws of nature exist that bring an order upon the world. The fact that the world is run under a consistent methodology and set of rules does not necessarily require the existence of god. A belief in God is an idea that explains the origin of the universe. I became a deist as a reaction to the feelings of guilt I received when going to church. A place of worship should not be a place of punishment but somewhere to embrace the goodness of God.
Belief in a god that does not selectively intervene does not mean that deists are nihilists. It is far from the case. It is the greatness of man that I hold as being of prime importance