ובמשפחתו. אָמַר רַבִּי שִׁמְעון וכִי מִשְׁפָּחָה מֶה חָטְאָה? אֶלָּא לְלַמֶּדְךָ שֶׁאֵין לְךָ מִשְׁפָּחָה שֶׁיֵּשׁ בָּהּ מוֹכֵס שֶׁאֵין כֻּלָּם מוֹכְסִין — שֶׁכֻּלָּן מְחַפִּין עָלָיו (ספרא; שבועות ל"ט): ובמשפחתו [THEN I WILL SET MY EYES AGAINST THAT MAN], AND AGAINST HIS FAMILY — R. Simeon asked, "But how did his family sin that it should be punished?" But the family is mentioned to teach you that you may take it as a rule that there is no family in which there is one tax-collector (a calling held in great reprobation by Jews) which may not be regarded as consisting entirely of tax-collectors, for they all try to protect him (Sifra, Kedoshim, Section 4 13; Shevuot 39a).
והכרתי אתו. לָמָּה נֶאֱמַר? לְפִי שֶׁנֶּאֱמַר ובמשפחתו יָכוֹל יִהְיוּ כָל הַמִּשְׁפָּחָה בְּהִכָּרֵת, תַּ"ל אֹתוֹ — אוֹתוֹ בְּהִכָּרֵת וְלֹא כָל הַמִּשְׁפָּחָה בְּהִכָּרֵת אֶלָּא בְּיִסּוּרִין (שם): והכרתי אתו AND I WILL CUT HIM OFF — Why is this stated (it appears to be a mere repetition of the statement in v. 3)? Because since Scripture says here for the reason stated above, “[I will set My face…] against his family", I might think that the whole family is also doomed to excision; Scripture therefore states “[I will cut] him [off]"— he alone is subject to excision, but the whole family is not subject to excision but to bodily sufferings (Sifra, Kedoshim, Section 4 14; Shevuot 39a).
לזנות אחרי המלך. לְרַבּוֹת שְׁאַר עֲ"זָ שֶׁעֲבָדָהּ בְּכָךְ וַאֲפִלּוּ אֵין זוֹ עֲבוֹדָתָהּ (ספרא): לזנות אחרי המלך TO COMMIT WHOREDOM WITH MOLECH — This is intended to include the worship also of any other idol which he worshipped in this way (by letting his children pass through the fire in honor of it) even though this is not the manner of worship peculiar to it (Sifra, Kedoshim, Section 4 15; Sanhedrin 64a).