When to Stone Your Children

Deuteronomy 21:18 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:
21:19 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;
21:20 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.
21:21 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.

Before the theists come out of the woodwork with the "But thats the ooooold testament!" garbage. Lets have a read of what Jesus Christ said in Matthew 5:17 shall we:

Matthew 5:17 Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfill.

So Jesus strongly approves of the law and the prophets. He hasn't the slightest objection to the cruelties of the Old Testament.