Sometimes it's hard to blame people for rejecting God, because many Christians present a God that is ugly, cruel, unfair, and utterly horrific. Thus, when people avoid Christianity, they're actually shunning their ugly perception of it.
When you hear people talk about God, what type of God are you imagining? When you speak of God, what type of God are you communicating?
Unfortunately, society's obsession with success, politics, business, security, wealth, and comfort has hijacked the way we see and interpret God — even Christians are guilty of this.
It's easy to manipulate God to fit our own agendas, to use religion to rationalize our actions, to wield spirituality as a weapon, and manipulate theology to rationalize our sins.