John 3:36

He who believes and trusts in the Son and accepts Him (as Savior) has eternal life (that is possesses it); but he who does not believe on the Son and chooses to reject Him, (disobeying Him and denying Him as Savior) will not see (eternal) life, but the wrath of God hangs over him continually. 

It’s hard to believe as Christians the reason anyone would reject Jesus.  Except, we had to be taught about Jesus ourselves before we believed.  A relationship with Jesus is a choice and people choose from their knowledge and experience whether good or bad.  That is why it is vital to be a loving, kind representative of Jesus here on earth to the lost and the familiar.