Naruto, you are appealing to instructions given to the nation of Israel while it was a theocracy. Show me where Jesus told Christian's to "slay women except for the virgins"? Israel was establishing a nation by conquering it and God who had waited 450 years for the "iniquities" of the Canaanites to be fulfilled was exercising His judgment on an idolatrous and evil society.
Ex 32:14
And the LORD repented of the evil which he thought to do unto his people.
[And the Lord repented of the evil] This is spoken merely after the manner of men who, having formed a purpose, permit themselves to be diverted from it by strong and forcible reasons, and so change their minds relative to their former intentions.
(from Adam Clarke's Commentary, Electronic Database. Copyright (c) 1996 by Biblesoft)
Ex 32:14
The Lord repented of the evil which he thought to do unto his people. God generally works by the instrumentality of means; and in this case the means of averting the wrath of God was the urgent intercessions of Moses, who, as the 'elect'-the leader chosen by Yahweh to accomplish in subserviency to His direction the great work of His people's deliverance and legislation-`stood in the breach before Him, to turn back His wrath from destroying' (Ps 106:23).
(from Jamieson, Fausset, and Brown Commentary, Electronic Database. Copyright (c) 1997 by Biblesoft)
Ex 32:7-14
Verse 14. "And Jehovah repented of the evil, etc." - On the repentance of God, see at Gen 6:6. Augustine is substantially correct in saying that "an unexpected change in the things which God has put in His own power is called repentance" (contra adv. leg. 1, 20), but he has failed to grasp the deep spiritual idea of the repentance of God, as an anthropopathic description of the pain which is caused to the love of God by the destruction of His creatures. - V. 14 contains a remark which anticipates the development of the history, and in which the historian mentions the result of the intercession of Moses, even before Moses had received the assurance of forgiveness, for the purpose of bringing the account of his first negotiations with Jehovah to a close. God let Moses depart without any such assurance, that He might display before the people the full severity of the divine wrath.
(from Keil & Delitzsch Commentary on the Old Testament: New Updated Edition, Electronic Database. Copyright (c) 1996 by Hendrickson Publishers, Inc.)
God has nothing to repent for. In His communications with man He has to be understood, and therefore we use words like "repent" so we (humans) can comprehend the mind of God.
A superficial reading of the Bible result is verses pulled from Scripture that demonstrates a lack of understanding what God is saying to mankind.