I have only briefly glanced at some of the posts in this forum so apologies if a similar discussion has already occurred. However, I would like to share my understanding of the word Kundalini and its relevance to spiritual matters.
In the Hindu system of faith deities are used to facilitate dialogue, contemplation and preparation. When one states that Kundalini "is" a name, or version, of the mother goddess, a false deity, they are thinking quite differently to a Hindu person. A Hindu fundamentalist might take this approach, but it is clear to any compassionate person who has spent any focused time studying the Vedic philosophy that underpins the discourse facilitated by deity worship, that a this kind of distortion of the original intention of the mother Goddess archetype and it's relationship with Kundalini leads to nothing but argument and often violence.
It is the fundamentalist approach, which is essentially an objectification of that which was original intended to be a facilitator of dialogue and contemplation, like a mythology or a parable, in to a real entity of objective existence, though unseen, that leads to the distortion. To anyone of understanding, the use of a deity to direct the mind towards a higher realisation is merely intended as that - to train the mind in an approach to further growth. A Vedic scholar and any other form of seeker of truth, be them a Brahmana, vaishnava, or even sahramana such as the Buddha or Mahavira, who intends to unravel the mysteries of existence does not project the falsity of a God or Goddess, and knows that in truth there can be nothing other than the one true being, the one God, as an entity of infinite subjective existence.
Rather, a seeker that chooses to enter a dialogue about a Mother Goddess is using the dialectic of Father/Mother to comment on the functioning of the creation. There are many who would not enter such a dialogue on such a level and may be immersed in an unrighteous practice of deluded understanding, but these are those who consider any concept of a God or Goddess to be objectively just one of many existent features of a creation, and these people are not those who are able to gather an understanding from mythological facilitators.
I would suggest that such people are also unable to understand parable, unable to hear the message of the Messiah as written in the texts we have as record from his coming 2000 years ago, and are as guilty of a misguided interpretation as those who they point the finger at - the people who actually worship idols, as if they where in some way real and not projected by distortion. Kundalini is not an evil spirit that is invading the church, this very thought process is a demonic idea in itself.
Kundalini energy is a type of control of the nervous system that is referred to in Yoga-Tantra, and it is referred to as a kind physical energy, accessed through certain physical combined with mental practices. The energy itself is something that can only be channelled through focused meditation, and clearing of the mind. It is not an easy practice, and it results in a state of bliss that can only be experienced by those who have learned to work with kundalini energy. It is not anything supernatural or ungodly, it is simply the flow of information, stimulus and response present in all beings, in all nervous systems, in this creation, being channelled and controlled to bring a harmonious balance to the body. Many of the gifts and fruits of the spirit mentioned in the bible are almost identical to the kinds of emotions and behaviours and abilities that come with a mastery of kundalini energy and the process of harnessing it. Of course the full gifts and fruits of the spirit cannot be gained by a kundalini practice, but it is not at odds with it - and "if they are not against us, they are with us". This is also why it is associated with the Mother Goddess.
In the dialectic between Father and Mother, the Father is used as archetypal reference for the spiritual and none physical, that reality in which the spirit resides and is. The Mother therefore becomes the opposite of this, and the Mother represents all that which is physical, beginning with the body. Thus, because kundalini is a physical energy of the body, it is of the Mother, and when the Mother Goddess, that which facilitates dialogue regarding the physical duality of the creation, as an analogy to that which is of the most subtle truth to discuss, is used to open the mind of a practitioner, it is associated with kundalini, in a kind of indexical sense - in other words kundalini and the Mother are both linked because the Mother is an archetype to facilitate discussion about the physical response to the Father spirit, and kundalini energy is experienced as physical.
The energy of the Mother Goddess might be described as kundalini itself, because kundalini is a name that refers to a physical nervous system contained energy present in all beings, and the Mother is that which is the physical reality of the creation. In the model, this leaves the Father as the spiritual reality of the creation, and in this sense is not out of line with the teachings of the messiah in any way.
Remember, this is just a model that is used to describe one of the deepest contemplations possible regarding the creation, that of the fundamental dialectic, the Father seed, and the Mother response - or the spirit in governance and observance of itself projected in the physical.
In a way the model resembles a feedback loop, or a Möbius strip, but now we are moving in to visualisation. Kundalini is a feature of a model, and nothing more. In this way it is part of an analogy; one that is only accessible to those who are with understanding, and one that is not at odds with the parables and teachings of the messiah.
Besides, how can anything evil invade the true church if the true church is that of God. This is like saying the Devil sat on the Lords throne while he wasn't looking, and how could the Lord not be looking, how could he not be eternaly on the throne? Unless of course one is talking about a church, and/or congregation that is not of the Lord, God, our Father in Heaven. In this case it is still impossible for evil to invade, because this church would be evil in itself, and how can evil invade itself?
It is nonsensical just to consider such a notion. I would suggest that those who think of things in such a way are in themselves lacking in understanding, no different to those who worship idols, and will miss the point of any mythological system, any parable, or any systematic facilitation or model used in discussion of the truth; and they will certainly not have the understanding necessary to recognise the messiah, or the Father, even if he stood, projected before them.
If such people are part of a church, I would suggest that the church itself is not in any way connected with the messiah's ministry, other than to be a worldly construction of a wayward son, before he realised his error, regardless of his brothers triumph 2000 years ago, and in ignorance of, or in other words without access to, the truth.