No, not really.
In the past few years a few potential students have asked me if they could still be a Christian and practice aikido. I guess that is a fair question. I myself walk a different spiritual path but my aikido teacher of the past 15 years is seriously into the work of J.C. So, of course you can be a christian and study aikido. OSensei himself said aikido completes all religions.
I never really thought about the reality models people construct for themselves. Some people believe and teach that are haunted by an unseen enemy - one that creeps into every aspect of everyone's life. That includes the martial arts.
A few years ago I thumbed a religious propaganada book called "prepare for war"
I looked at it originally because I thought from the cover it was cool that Jesus was using a light sabre. My eyes perked up when I saw the line "yoga and martial arts seduce you into worshipping demons." This book also includes such statement as the strength gained in martial arts is really demonic power. It also includes the lines that began this posting "Do you know how Satan can use "doorways" including yoga, role-playing games, and meditation, to bring demonic destruction into your home?"
Now I myself laughed this stuff off as crazy talk. It is the work of my own country's religious extremists. However this kind of "fear" talk really makes the humble martial artist a target in the eyes of those who believe this information. It makes our teachings and way suspect.
I thought this was a minority opinion. Then I started finding these....Pat Robertson here has some interesting lines steeped heavily in ignorance of the martial way.
Then there is the lady at the beginning of this next film.
Jesus did not instruct us to use cars, eat fajitas or use the internet either.
I will conclude with this thought.
Both religious practice and martial arts can bring peace, tranquility, and a enhanced connection to the divine. I will also state that both religion and martial arts will invite darkness and negativity to your life.
What is the difference? What makes a healthy practice of religion and martial arts versus a corrupted practice?
Power and it's use
I know my martial arts practice has these qualities that "lights the lamp that chases away the darkness". I hope your religion does too.