Is there any point at which this "fervor" becomes something that is contrary to the teachings of Christianity?
Depends what proof texts you want to use. :>)
Yes, without question, there is a point at which this "fervor" becomes something that is contrary to the teachings of Christianity.
It is also my opinion that there is another point at which this "fervor" becomes something that is contrary to what we want in our forums.
Probably when the fire actually reaches the logs piled around your feet. ;^)