Sometimes we fool ourselves into thinking we are what our mind tells us we are... and we can allow our minds to convince us of many strange things...
Hypnosis is one of those areas that gets into mind control/submission to another, the hypnotist in this case.
Its kind of like trying to get healed by going to a psychic and having her lay hands on you...
Only someone who didn't believe in God as a reality would go for hypnosis, which in itself says, 'the problem is in my mind' and negates the possibility that God is control. So to say a Christian would get hypnotised, well what kind of Christian.
Any type of repetitive chanting, incantation type stuff, trancendental type meditation, as a way of seeking God, is along these lines... putting oneself into a formula approach to God... and does open the door instead to the enemy, who will take any opportunity to play god... by allowing or enabling the spriits within a person to take hold of the forefront... instead of being bound below. Speaking to the subconscious... which many times can be full of more evil than good. If it were not so, people would not have nightmares. The very moment you begin to even consider something like hypnosis as a 'cure' the devil knows that you do not know God. its is right then an opportunity for himself. And he is very shrewd and adept at these matters. hes been around a long time playing with peoples' heads/emotions, he knows every trick.
Always remember, the devil mixes truth with his lies, not everything he does is out and out 'bad' but you have to look at the bigger picture, the long haul, not just a daily view of things... and where do all these things lead.
God is quite real, you do not have to seek nor should you seek Him through your subconcious.