If a man have a stubborn and rebellious son, which will not obey the voice of his father, or the voice of his mother, and that, when they have chastened him, will not hearken unto them: Then shall his father and his mother lay hold on him, and bring him out unto the elders of his city, and unto the gate of his place; And they shall say unto the elders of his city, This our son is stubborn and rebellious, he will not obey our voice; he is a glutton, and a drunkard. And all the men of his city shall stone him with stones, that he die: so shalt thou put evil away from among you; and all Israel shall hear, and fear. -- Deuteronomy 21:18-21
He that smiteth his father, or his mother, shall be surely put to death. -- Exodus 21:15
He that curseth his father, or his mother, shall surely be put to death. -- Exodus 21:17
The eye that mocketh at his father, and despiseth to obey his mother, the ravens of the valley shall pick it out, and the young eagles shall eat it. -- Proverbs 30:17
And he went up from thence unto Bethel: and as he was going up by the way, there came forth little children out of the city, and mocked him, and said unto him, Go up, thou bald head; go up, thou bald head. And he turned back, and looked on them, and cursed them in the name of the LORD. And there came forth two she bears out of the wood, and tare forty and two children of them. -- 2 Kings 2:23-24
It appears that Jesus says not to do these kind of things:
Matthew 15
1 Then came to Jesus scribes and Pharisees, which were of Jerusalem, saying,
2 Why do thy disciples transgress the tradition of the elders? for they wash not their hands when they eat bread.
3 But he answered and said unto them, Why do ye also transgress the commandment of God by your tradition?
4 For God commanded, saying, Honour thy father and mother: and, He that curseth father or mother, let him die the death.
5 But ye say, Whosoever shall say to his father or his mother, It is a gift, by whatsoever thou mightest be profited by me;
6 And honour not his father or his mother, he shall be free. Thus have ye made the commandment of God of none effect by your tradition.
7 Ye hypocrites, well did Esaias prophesy of you, saying,
Thank you, these are some great passages that help to draw a distinction. The passage from Deut 21:18-21 is perfect, because it answers why they shall be surely put to death: to put away the evil from among you, from among the nation, from among the congregation. Because they did not put away the evil from among them, they break the Lord's Mosaic Covenant. I seem to recall the story of David numbering the peoples, and it displeased the Lord and the nation was punished by a drought if I am not mistaken. So I would ask myself does it seem fair that for the sins of one that the whole of them should suffer? Kind of like by one man sin entered into the world. Yet when we look at what the prophets declared concerning the new covenant:
Jer 31:29-30
In those days they shall say no more,
The fathers have eaten a sour grape,
and the children's teeth are set on edge.
But every one shall die for his own iniquity:
every man that eateth the sour grape,
his teeth shall be set on edge.
The Mosaic Covenant demanded that you separate the evil from among you. The New Covenant asks you to overcome evil with good. Did not the Pharisees condemn Jesus for eating with publicans and sinners?
After the flesh we are governed by the laws of the nations that rule us, and in some places those laws are influenced by the will of the people. But when the church or people within the church vehemently fight against the proposal for homosexual marriage. Which covenant drives their motivations to take up this fight?