Nephi uses Isaiah to teach us about
1. The remnant (Shearjashub)
2. God with Us (Emmanuel)
3. The opposite, destruction and terror when we don't turn to the Lord (Mahershalahashbaz)
4. The Child who will be Victorious and usher in a rule of hope and salvation (Jesus)
While the politics and story is a little hard, the analogies used of the children help us see the vision of the Lord and His saving grace.