Ok lets get this straight-
God gave us His Word, right? Right. You said that everyone has their own interpretation for it... God had one meaning and one meaning only for His Word, not different meanings. God is not a God of confusion. So, there is only one true interpretation. And yes, I do believe my beliefs are the correct ones. If you think that sounds a little "selfish", well, don't you think what you believe is right? Yes, if you knew it was wrong- you'd change.
So... God will judge the un-saved for their sins before a holy God. Seeing their own sin enlight of a holy God, they will definately feel like a sinner, wouldn't you say?