"Can you think of an evil action that can only be committed by a religious person?"
Being man-made, "religion" in and of itself,is no defining line between humans as far as moral behavior.
Atheism is just as valid a "religion" as modern Christianity.[have you ever noticed that the spellcheck function capitalizes both words?]
Belief in a Supernatural Force commonly referred to as "God" is a function of man's Spirit, so "spirituality" is the proper dividing line between humans.
So... to answer your question.... Doing evil to a fellow human in the name of some "god" can only be done by one who professes a belief in that god.
Of course.. if a man uses "Science" to justify his non-belief, then for practical purposes he has made "Science" his God, because it quells his natural spiritual yearning.
He can then slaughter babies in the name of HIS god.
So, I reckon the answer to your question is..."NO".
