#What is the House of Jacob called and from whom do they descend?

They are called Israel and they are descended from Judah. [48:1]

#What is Israel doing insincerely and in unrighteousness?

Israel is swearing by the name of Yahweh and invoking the God of Israel insincerely and in unrighteousness. [48:1]

What would have happened if Israel had obeyed Yahweh's commandments?

If they had obeyed their peace and prosperity would have flowed like a river and their deliverance like the waves of the sea. Their descendants would have been as numerous as the sand and the children from the womb like its grains. Their name would not have been cut off nor blotted out from before him.