I think the most unbelievable part of Christianity is that God still loves everyone, whether they believe or not, whether they are good or bad. That even those who claim to be Christians, but do not love others as God loves, are still loved by God. That even those who refuse to accept God's love, are still loved by God. Jesus came that we might know the Father and witness His love, and even though humanity still rebels and refuses to fully believe, God still loves us; all of us, for eternity, whether we choose his Kingdom or not. It is hard to believe that God could love every single human being that has ever lived, and ever will live. But that is what people who claim to be Christians should believe and should be acting out in their own lives.