Dictionary.com: all
adjective
1. the whole of (used in referring to quantity, extent, or duration): "all the cake; all the way; all year."
2. the whole number of (used in referring to individuals or particulars, taken collectively): "all students."
3. the greatest possible (used in referring to quality or degree): "with all due respect; with all speed."
4. every:
The prot position now is that All doesn't mean all and can no longer be trusted. Is that what you are saying?
Not in the least, if you are trying to say that the word "all" in that passage includes the Christ; no way.
Jesus Christ is the Son of God, one of the three aspects of the Trinity (the Triune God), along with the Father and the Holy Spirit. As all Catholics and Protestants say if or when they repeat the Nicene Creed,
... one Lord Jesus Christ, the only-begotten Son of God, begotten of the Father before all worlds, Light of Light, very God of very God, begotten, not made, being of one substance with the Father...affirming that He was and is Divine, and did not sin when he took the form of Jesus of Nazareth. The "all" you are referring to indicates all humans, who are born into sin and who need the salvation Christ offers.
Where in the world do these ideas come from? We have been saying that forever.