Wouldn't you agree that God has different arrangements for those who REJECT Christ, and those who do not KNOW Christ but obey the Law written in their hearts?
John 3 is condemning the former. Nothing is said about the latter group in that Scripture.
Regards
http://www.freerepublic.com/focus/f-religion/1531691/posts?page=39#39
The above link was where I posted some initial thoughts that deal with the question you've just posed. I was attempting to show those unbelievers who could not possibly qualify.