Sorry, David but surely to be a Christian you have to believe in Jesus Christ as your Lord and Saviour and that salvation comes only through that belief (possibly that's overly Lutheran but you get the point). If you believe that others can reach Heaven then does that not make being a Christian...
The verses you refer to are about the Day of Judgement "And these shall go away into everlasting punishment: but the righteous into life eternal" So who are the damned and who are the saved in your world ?
Chimneys quote is from a letter written by Einstein and is fairly self-evident in it's meaning. The idea that the most powerful nation on Earth contains so many theocratic cretins in positions of power is actually scarey.