DoubtingThomas
Atheists are a cult.
Anti-Jws are in a cult.
That's why I don't bother arguing with people on the term "cult" but add in that things like Jehovah's Witnesses are a "dangerous mind control cult."
Loosely, many groups have cult characteristics. But atheists are free to do as they please. Most Catholics are free to sin and don't get shunned by their grandmother.