|ז. כִּי יְסִיתְךָ אָחִיךָ בֶן אִמֶּךָ אוֹ בִנְךָ אוֹ בִתְּךָ אוֹ אֵשֶׁת חֵיקֶךָ אוֹ רֵעֲךָ אֲשֶׁר כְּנַפְשְׁךָ בַּסֵּתֶר לֵאמֹר נֵלְכָה וְנַעַבְדָה אֱ־לֹהִים אֲחֵרִים אֲשֶׁר לֹא יָדַעְתָּ אַתָּה וַאֲבֹתֶיךָ: ח. מֵאֱלֹהֵי הָעַמִּים אֲשֶׁר סְבִיבֹתֵיכֶם הַקְּרֹבִים אֵלֶיךָ אוֹ הָרְחֹקִים מִמֶּךָּ מִקְצֵה הָאָרֶץ וְעַד קְצֵה הָאָרֶץ: ט. לֹא תֹאבֶה לוֹ וְלֹא תִשְׁמַע אֵלָיו וְלֹא תָחוֹס עֵינְךָ עָלָיו וְלֹא תַחְמֹל וְלֹא תְכַסֶּה עָלָיו: י. כִּי הָרֹג תַּהַרְגֶנּוּ יָדְךָ תִּהְיֶה בּוֹ בָרִאשׁוֹנָה לַהֲמִיתוֹ וְיַד כָּל הָעָם בָּאַחֲרֹנָה: יא. וּסְקַלְתּוֹ בָאֲבָנִים וָמֵת כִּי בִקֵּשׁ לְהַדִּיחֲךָ מֵעַל יְ־הֹוָ־ה אֱלֹהֶיךָ הַמּוֹצִיאֲךָ מֵאֶרֶץ מִצְרַיִם מִבֵּית עֲבָדִים: יב. וְכָל יִשְׂרָאֵל יִשְׁמְעוּ וְיִרָאוּן וְלֹא יוֹסִפוּ לַעֲשׂוֹת כַּדָּבָר הָרָע הַזֶּה בְּקִרְבֶּךָ:||7. If your brother, the son of your mother, tempts you in secret or your son, or your daughter, or the wife of your embrace, or your friend, who is as your own soul saying, "Let us go and worship other gods, which neither you, nor your forefathers have known." 8. Of the gods of the peoples around you, [whether] near to you or far from you, from one end of the earth to the other end of the earth; 9. You shall not desire him, and you shall not hearken to him; neither shall you pity him, have mercy upon him, nor shield him. 10. But you shall surely kill him, your hand shall be the first against him to put him to death, and afterwards the hand of all the people. 11. And you shall stone him with stones so that he dies, because he sought to lead you astray from the Lord, your God, Who brought you out of the land of Egypt, out of the house of bondage. 12. And all Israel shall listen and fear, and they shall no longer do any evil such as this in your midst.|
The pasukim are actually a prophetic reference to Jesus. What did Jesus do? He led fellow Jews astray, and for that he was chayiv misah (The fact that the Romans killed him via crucifixion is not really relevant here. But according to John 10, Jews did attempt to stone Jesus.)
But more importantly, Jesus was the "son of your mother" simply because he supposedly had no father!
We laughed at the time at this cute little drasha, and many years later I like to think that he was just having a bit of fun. But in the back of my mind there is still a nagging feeling that he was being perfectly serious and truly believed this explanation.