The missing word is the tetragrammaton. Every time you see "The LORD" in the OT, it is the tetragrammaton.
The Hebrew characters are yod, hey, vav, hey. The pronunciation is debatable. I can argue in favor of 3 different ones.
The Jews are more concerned with it being heard by the pagans, and thereby, abused. Most have no fear of using it in the synagogue, even though they will defer to Adonai, regularly.
Jesus, or more accurately Yeshua is YHVH. The Bible makes it clear that Yeshua is the physical manifestation of God in the flesh. God is a spirit. To be in the natural, he becomes Yeshua. Yeshua is the Word, or "miltha" of YHVH. Throughout the OT, YHVH manifested himself as "the Word." Genesis 15:1 would be one of many examples.
James 4:12 says one lawgiver saves. Is Jesus the savior? Then He is also the law giver...
The verse cited in the original thread continues to say, "before me there was no God formed, neither shall there be after me."
So, if Yeshua is God, then he is YHVH.
The triune deity concept is a Greek/Roman thing. The Bible says YHVH is singular. Deuteronomy 6:4
Do not accept the Council of Nicea's theology. They hated the Jews. They never lived or experienced Torah. How can they be authorities on a book they did not understand? All NT theology must be formed with Torah as the spiritual constitution. It is the key to rightly dividing.