Do we really have to add benign or destructive to an already negative word? Most people understand the word cult to be negative. Why use the word and say it is a benign cult? Talk about confusing people.
The WTS is a cult in the most negative definition of the word.
They might not kill people all at one like Jim Jones or the Branch Davidians. They do kill people off one at a time.
They don't live in communes. They convince people to separate themselves from every non-JW person including family members who have never been JWs or have left.
They don't have 1 person at the head of it all. They have a group of them that over the century has guaranteed continuity a lot longer than any 1 person every could.
They control every aspect of a JW's life.
It isn't about what they believe. It is about how they implement those beliefs. It is about how they control their members lives.