Is this prophecy declaring Yeshua the Messiah to be the Heavenly Father? There are at least 27 names in the Bible with the same Hebrew construction as in this verse. Each one means the "father of (something)." For example, Abishua means "father of plenty." Instead of translating the phrase in
Isaiah 9:6 as "Father of eternity," the KJV reversed the sequence making the true meaning harder to discern. Several newer versions correct this mistake such as The Emphasized Bible, The Bible in Basic English, The New American Bible, The Holy Bible; A Translation From the Latin Vulgate in the Light of the Hebrew and Greek Originals, and The New English Bible, just to name a few. Yeshua is the Father of Eternity because eternal life comes to us through him. And so it is written in
Hebrews 5:9, "And being made perfect, he became the author (or father) of eternal salvation unto all them that obey him;" Even if you refuse to use the correct Hebrew translation of "father of eternity", Yeshua can still be consider a "father" since he has "seed" (
Isaiah 53:10) and he will live forever. Also, you deny the trinity by saying Jesus is the Everlasting Father since the trinity doctrine emphatically declares the Son is NOT the Father.
As for "Mighty God", Yeshua is a "mighty el"/"mighty warrior"/ "powerful warrior" and a host of other ways "el gibbor" can be translated. He CANNOT be "Mighty God" because there is only one true God which is what using a capital "G" would denote.
As for the Son being the Holy Spirit, again you deny the trinity which emphatically declares the Son is NOT the Holy Spirit. If they both share the same title of "counselor", that does not mean they are the same being anymore than Yeshua and Cyrus sharing the title "maschiach" (anointed) makes them the same being (Isaiah 45:1).