Please first realize that I do not mean to impugn the bible in any way. It is a sacred book of many truths and indeed as is proclaimed by many, a word of God. Not the "only" word of God in my opinion. I feel God speaks in many ways and as the wind blows and the snowflakes fall I hear the word of God in those actions as well.
So too with the communications of humans. God comes to and is with all of us Christian, Buddhist, Islamist, Hindu, and Aboriginal people alike as well as all others. God speaks to all of us in the words that we are able to hear and understand.
Your question is from your understanding and interpretation of the bible as you have been taught and as has been inculcated within you. You have absolute beliefs that do not allow other perceptions or observations to come into play.
As this is the case I can only use what you have given for me to use in attempting to help you understand the connection between Christ and Kundalini and God and Kundalini as is understood through the scriptures.
For the purpose of this explanation I must use the Holy Fire and the Holy Ghost, and the Holy Spirit to be representing of the Kundalini. And of course the bible doesn't mention the word Kundalini as that word predates much of the Christian writings and is of the Sanskriti peoples. Not the peoples of the lands of the bible.
Please read St Theresa of Avila's autobiography and you can see how she works with this blessing as well.
There are parts of the bible that are conveniently overlooked by today's Christian theologians. They will relegate to symbolism that which they do not understand and the powers of the Holy Spirit as well as the potentials of people as described by the Christ are only some of the examples of current misunderstandings.
What remains of the bible after the King James version still has much truth and some of these truths are to be taken literally not as symbolisms.
Christ says "Know ye not that ye are Gods? All these things I do you can do and more..." Forgive my incorrect quotes but you can get the point. I do not see any symbolism there in those words. I see truth.
Another one brought to me recently describes the teaching by Christ about the third eye and the location of it. These are not accidental references to something other than what is being talked about whether or not it fits into nice and neat little packets of information for the masses to swallow.
These are truths.
As far as the Baptism goes what would make a person feel that this isn't the case with the Kundalini? What would make one feel that Kundalini and the Holy Spirit are different? Does the concept need to be printed in the bible, in the English words from the Aramaic words in order to "fit" into the current philosophies of contemporary Christian understandings?
I personally do not feel this needs to be validated by the limited understandings of the bible, in the limited minds of Men and Women, of the lessons given through the bible. Validation comes from experience and if a person has experience that helps them to understand Kundalini as separate from the Holy Spirit then fine I am happy with that and if a person has experiences that allows the opposite to happen them fine I am good with that too. The bible still has secrets to unfold and the time is not yet ripe for those understandings to be given. More experience for those who follow the Christian Path need to be allowed for.
Fasting for forty days can activate the Kundalini in a person. Yet I feel Christ didn't need to have that occur as he was active "going into" the desert. There are those who come among us who are in a state of advancement compared to those they come amongst at the time they incarnate. Jesus Christ was one of those imho. I cannot prove this but I feel it.
Kundalini IS the Holy Spirit in my opinion. It IS the Holy Ghost and it IS the Fire Of Christ and the Fire of God. It is all of these things. Whether or not that can fit into the current thinking of Christianity is not the point.
Most Christians do not believe that they are Gods and can do the miracles of Christ and more either. So it is as it is at this time for those precious people. In Gods good time will they come into an understanding and an experience of the Holy Spirit as is described upon the body by the Kundalini.
It will be up to you to make the correlations between "what you believe" the bible to be saying and what is happening to a person inside of the Kundalini. When you ask this question of the Christ what is his response? - Blessings - chrism
Kundalini is our overt and conscious interwoven communication and interaction with the absolute. The exaltation of the flesh through spiritual evolution. We swim in the divine current rather than blindly walk through its puddles.