This is a quote out of the context of the Bible. (斷章取義). Everyone should take accountibility and responsibility for their own misconduct. This is the reason why we have laws and orders. This is the truth of causes and consequences. Some sins are unforgivable.
It is absolutely ridiculous to believe that ones can go to heaven by confession and extreme unction in his last days of life even though they have committed horrible crimes during their lifetime. No, the door of heaven will not open for them.
God will never forgive demons. Satan is the enemy of God. There are clear instructions in the Bible to teach us how to punish the enemy of God.