Hmmm I don't know where you got the idea that everyone is forgiven, including unbelievers. If we were all forgiven, we would all go to Heaven, no matter if we accept Christ or not. But in reality, only Christ is our forgiveness, you can't separate forgiveness from salvation....because God would then be an unjust God who punishes people who are already forgiven. Lets put it this way: God paid the debt with Jesus' sacrifice, but if you don't accept his payment, you will die in your debt, you are not forgiven. We die in our sins and we are judged by our sins if we don't accept Jesus' sacrifice.
That's why Jesus said this:
''That is why I said that you will die in your sins; for unless you believe that I Am who I claim to be, you will die in your sins." John 8:24
I don't wanna sound like I'm just being a hater, but I seriously don't see that idea in the Bible. If we all had forgiveness, I wouldn't feel motivated to preach Jesus to my unbeliever friends and family.
To Him all the prophets witness that, through His name, whoever believes in Him will receive remission of sins." Acts 10:43
Notice how it says that you WILL receive remission of sins, it doesn't say you already have it.