This is an odd take, and I disagree. It's up to the laws of the state to dispense the punishment, not the father. That would have been murder. We are not qualified to dispense the punishment of the state/country we're living in.
Rom 13:1 Every person is to be subject to the governing authorities. For there is no authority except from God, and those which exist are established by God. 2 Therefore whoever resists authority has opposed the ordinance of God; and they who have opposed will receive condemnation upon themselves. 3 For rulers are not a cause of fear for good behavior, but for evil. Do you want to have no fear of authority? Do what is good and you will have praise from the same; 4 for it is a servant of God to you for good. But if you do what is evil, be afraid; for it does not bear the sword for nothing; for it is a servant of God, an avenger who brings wrath on the one who practices evil. 5 Therefore it is necessary to be in subjection, not only because of wrath, but also for the sake of conscience.
1 Pet 2:13 Submit yourselves for the Lord’s sake to every human institution, whether to a king as the one in authority, 14 or to governors as sent by him for the punishment of evildoers and the praise of those who do right.
If the law states for murder is death, then it's up to the state to dispense punishment.