If you don't know that fate of one who boldly proclaimed, "There is no God", and has never made a public profession of faith, to our knowledge, then how do you know the fate of those who have placed their trust in Christ? I don't think you can have one without the other. Do you? Can you, with confidence tell someone that if he trusts in Christ that he will be forgiven and reconciled to God? If so, why can't you say, for sure, that anyone who does not trust in Christ will not be forgiven or reconciled to he Father?
From the evidence of one's life and the profession of his mouth (or keyboard) I am confident that we do in fact know, if we trust what we have been told by Christ.
Self-righteouness is a poison, so I am glad you "checked" yourself, but there is a way in which to discuss what we do know, without being self-righteous. Self-righteous, as far as I understand it, is looking to our own righteousness, rather than Christ's, for our justification. I don't see any evidence of anyone doing such a thing in this thread, unless they are on my ignore and I missed it. I for one would never imagine myself being more worthy than any man of Christ's forgiveness as I am truly a wretched sinner deserving of condemnation. The gospel tends to make one immune to self-righteousness.