An atheist does not believe that any fairy tales, whether from the Brothers Grimm or current day monotheism, are real because there is no evidence to support the assertion that they are. The "Antichrist" is just another boogeyman, Anubis, Fenris Wolf, etc. that throughout mythology will come to destroy the earth, blah, blah, burn, blah, blah.
An anti-theist points out the sociological, psychological and political machinations that religion has been using since the dawn of history to manipulate and control humanity, to create divisions and creed. Religion is how liars and village idiots can somehow find a vocation and claim false equality or superiority to their moral or intellectual betters. Anti-theists make no bones about how religion is detrimental to humanity.
At its core, modern day monotheism is the belief in an existence where everything you own, know and care about is given to you or taken away by the hand of an invisible (imaginary) all powerful master, which you fear and are forced to love, and at a certain point will reward you if you please them but you will forever fall short of being worthy -- sounds an awful lot like slavery. What makes the concept even more ludicrous is that this form of slavery is SELF-IMPOSED.
IF you want to know where the real problem is, base it off of demonstrable evidence. DEMONSTRABLE EVIDENCE can be replicated, and the data remains relatively consistent under the same conditions. E.g.
Do a google search for "Atheist sex offenders" (include quotes) and you will get : "8 results (0.51 seconds)"
Do a google search for "Christian sex offenders" (include quotes) and today you will get: "About 11,300,000 results (0.63 seconds)"
Upon reviewing the data, common sense indicates that atheists are NOT the problem.