If he was a Christian like he had claimed, then he would have accepted Jesus as his Lord and Savior, had a personal relationship, and believe Jesus is the Son of God. If he believed those three things then yes he will be in Heaven.
But you cannot just put out that he was the most peacful and loving man alive, but since he didn't believe in God, that he will go to Hell. That is twisting the mind of what seems right and wrong. Yes, he was a peaceful, loving man, but if he didn't do the three things and recieve Jesus, then as the others have said, he is frying bacon for Satan right now.