“Of course your fate is sealed. But that doesn’t mean the purification of you soul is complete before you may enter into Heaven. Do you think a repentant “christian” mass murderer enters Heaven at the same time a baptized infant does, if they both die at the same moment? “
If the murder has entrusted himself or herself to Christ for forgiveness and eternal life - apart from their own works, every single, evil sin is forgiven. Christ paid for it all.
It is a glorious exchange - our sinful nature and sins we committed for His righteousness and nature. Glory to God.
So, yep! Glory to Him. To deny it is to misunderstand or fail to apprehend the meaning of the cross and be stuck attempting to pay for your own sins.
2 Corinthians 5:21 For our sake he made him to be sin who knew no sin, so that in him we might become the righteousness of God.