Jesus, that we had accepted as Mormons, is not the Jesus of the Bible. Jesus of the Bible is literally God Almighty who became a man to redeem us (Isa. 7:14; 9:6). He created everything including Lucifer (Col. 1:16) and He is not a brother of human spirits nor a brother of Lucifer. He is the only Way, the Truth and the Life. His salvation is a Gift so no one can boast of earning it (Eph. 2:8-9). But one must know Him first as John 17:3 says.
Isaiah 7 is about Hezekiah not Jesus.