Do you believe in the sun? Do you think that the sun exists?
I certainly do. I've never doubted the sun's existence, even when it was out of sight. And I don't think anyone else has either. Certainly, I've never heard of anyone who claimed that the sun doesn't exist. Even solipsists, I'd be willing to bet, would admit that they perceive the sun, even if they deny that their perceptions are indicative of reality.
People even agree on details about the sun, even when those details change, and vary from place to place. Someone in China will say the sun is up at the same time someone in America will say the sun is down, but both will agree that the other is correct for their location.
Why are people in such unanimous agreement about the sun? Is a supernatural entity using telepathy to mind-control us? No, the reason we agree about it, is because we can see it. The evidence for its existence is right there, clear as day.
Some people say that the evidence for god is clear and obvious, but it's clearly not as obvious as the evidence for the sun. If it were, there wouldn't be such disparate religions. Christians, Muslims, Hindus, Buddhists... People can't even agree on whether god exists, let alone specific details about him.
Some people say that god wants us to believe in him. But surely an omnipotent would be capable of performing a feat that an inanimate object has managed. If god wants us to believe in him, he must not want it very much.