But what god will do if it is real shouldn't depend on whether I believe or not. And even if i don't believe in gravity, it still has an effect on me. Your god doesn't have any effect on me if I don't believe?
Ironically, I pretty much agree with everything you are saying. It's always interesting to me that two people can look at the exact same things, say the same things, and then come to opposite conclusions.
You are correct. What you believe, ultimately will have no effect on the outcome.
A criminal may not believe in justice, may not believe in law enforcement, and may not believe in judgement. But when they drag him off to prison, whether he believes in such things will not matter.
Just like whether you believe in gravity or not, will not matter when you step off the edge of a cliff, and fall.
Whether you believe in life after death, will not matter after you die. If it is real, then you will face it, whether you believe it or not.
Whether you believe in being judged for how you lived your life in that after-life, will not matter once once you die. If it is true that your actions in life will be judged on their merit, you will face that whether you believe in it, or not.
What matters, is not whether you believe.
If you are hooked on Heroin, you can believe that Heroin will ruin your health, or not believe that Heroin will ruin your health. It does not matter. Heroin will ruin your health.
And it's not because you refused to believe the doctors, that the doctor caused the drugs to destroy you.
Just because you don't realize the drugs are killing you, doesn't mean it's the doctors fault, and everything was fine until the doctor warned you that heroin ruins your health.
G-d is warning everyone that your sins are killing you. G-d offers a gift of forgiveness, to those who accept and repent of their evil ways, and will save your very soul for eternity.
But just 'believing' in G-d has no effect. The Devil and his Demons, all 'believe' G-d exists... still going to their eternal punishment for their evil.