> If you believe that God forgave your sins at the behest of Christ, and that you will enter an eternal kingdom also as a son of God, wouldn't you eventually be more liable to forgive and love others?

No. History has been the judge and has left Christianity wanting. You want a faith that truly causes love and care for others? Jainism. "By their fruits you shall know them" Jesus said didn't he? Well the fruits of Christianity are rotten.