And a certain spirit is instilled that reacts to Christianity
For exorcising this spirit, first it needs to be named.
Based on what you've written, I'm suspecting two spirits working in tandem. Con artists often work in pairs. One is out front, the other is hiding in plain sight. It's very common in spiritual ailments to overlook the pairing, the coupling, of energetic principles ( aka spirits ), because in spirit there is no time-and-place, there is no here-and-there. All is concurrent and omnipresent. Because of this, a confluence of spiritual principles will almost always present as a singular influencing force. It takes practice to sift through it and isolate the contributing factors or factions.
That said: if the spirit is reacting strongly to Christianity, then, my first suspect is a demon who's most simply known as "Shame" who very often partners with a higher order demon most simply known as "Blame".
If these two are at the root of your affliction, one way out, which has worked for the few I've endeavored to help, is deconstructing these two demons, then redirecting them and/or nullifying them depending on the circumstances.
Just like almost anything that exists, "Shame" and "Blame" are both healthy useful energetic principles when they are brought forward in the right time, in the right place, in the right way, and among the right individuals. However, these two are extremely powerful constructs within the psyche, and because of that, they are often easily abused. Meaning: these two are often used in the wrong time, in the wrong place for the purpose of avoidance and denial of uncomfortable truths. More specifically, while an individual is shaming and blaming, they are being rewarded psychologically ( aka spiritually ) from the avoidance of their own personal responsibility, or from the avoidance of feeling pressure to take appropriate action. This avoidance is so effective, and so rewarding, the psychological reward becomes addictive. Then, if the individual continues to rely on Shame-and-Blame to bring relief from avoiding instead of confronting them, the demon takes hold and causes other ailments tangentially.
If you've ever worked in a corporate environment, it's easy to see "Shame-and-Blame" influencing and working their magic within the office politics and drama that inevitably occurs.
If this makes sense, and matches your situation, and if you're ready to confront these demons to deconstruct them to put them in their proper place so that they are never able to bother you again, let me know. I'll try to help.
Best wishes on your journeys; where ever you roam,
-ziran-