I before E except after C.
There was a time in history when the statement," I am a Christian," meant something. That time has long past.
One can find groups or individuals that practice everything from deviant sexual behavior (Christian swingers) to mass suicide (Jim "pass the grape kool-aid" Jones and the Waco bunch).
It is therefore obvious to even the most casual observer that one must define the term "Christian" before using it as protection from the sheer stupidity and anti-Christian rant that is sure to follow.