To be clear, I said in my challenge to show me a quote in the Bible where Jesus says He is part of the trinity. But let’s look at what you have quoted.
I agree 100% with your comments here. It says that Jesus is of the same divine essence as God and together they created everything from the beginning, but only God is eternal. No mention of a trinity. It does clearly say that Jesus was the incarnation of the Son of God.
Peter is simply confirming that a sin against the spirit or any spirit is a sin against God.
This is a great example of the language used in the bible about having the spiritual essence of God in each of us, while at the same time distinguishing the uniquenesses of having the spirit of Jesus Christ in only His followers. Each one of us, has a piece of God in our soul and spirit, even Satan. Without this gift of eternal life, we all would die, so would Satan. The difference is clearly stated here: “Anyone who does not have the Spirit of Christ does not belong to him.” If you do not believe in Jesus as your Shepard, your King, then you do not belong to Him, as Satan does not belong to Jesus.
Readers of the Bible confuse the word “spirit” too often to mean only Holy Spirit. But Romans 8 clearly states the difference between the spirt of God and that of Jesus, thus it is not speaking of the same essence.