A man that doeth violence to the blood of any person shall flee to the pit; let no man stay him. -Proverbs 28:17, KJV
It may seem like this verse is saying “Leave a murderer alone,” but we must remember that proverbs tend to speak on truths, not necessarily declare truths.
Rather, what Solomon was saying is more akin to “Avoid the violent person who refuses to change.” It does not mean that person should not be imprisoned or otherwise punished, but do not try to change the person.
That may seem like a strange thing for a Christian to say. Hear me out.
We can not change a person. Only God can do that. We can pray for God to change them, but it is His to do.
In fact, that was a big reason Jesus came, and it points to the ultimate truth of this verse.
Jesus shed His blood and sent the Holy Spirit to change us. If a person refuses the Holy Spirit and denies Jesus’ sacrifice (the full definition of “blasphemy of the Holy Spirit”), they remain under the wrath of God and responsibility for Christ’s blood being spilled. They are still on their way to the pit, to eternal death.
There is nothing else we can do after telling them the truth of the gospel.
Share the truth, but do not force the truth on them.