Here is the definition of a destructive cult and brainwashing.
The 3 characteristics that define a destructive cult:-
1. A charismatic leader who is the object of worship, and usually claims divine power.
2. A process of coercive persuasion or thought reform (‘brainwashing’);
3. Exploitation of group members, in the form of money, labour, sex and/or other, by the leader
Forum:
"Cults," Sects, and "New Religious Movements"