The Scofield Bible Commentary, by Cyrus Ingerson Scofield, [1917], at sacred-texts.com
whole family
The language here, and the expression "house of Jacob," (Amo 3:13) evidently gives the prophecy a wider application than to "Israel," the ten-tribe northern kingdom, though the judgment was, in the event, executed first upon the northern kingdom. (Kg2 17:18-23).
therefore
It is noteworthy that Jehovah's controversy with the Gentile cities which hated Israel is brief: "I will send a fire." But Israel had been brought into the place of privilege and so of responsibility, and the Lord's indictment is detailed and unsparing.