Not all cults are religious.
Yes agree. Not only that but telling someone that he/she is displaying cult-like behavior is NOT an insult if it can be substantiated with facts. Likewise if someone "smells" that also can be substantiated with facts.
It is FACTS that should be the driving factor, not the idea that if someone is insulted that has to mean that whatever was said is not appropriate.
When you tell a JW that he/she is displaying cult-like behavior that person could just claim it's wrong because it hurts his feelings to. So what, if in fact that is the truth?
It is undeniably true that you can display cult-like behavior when it comes to politics, and to that extent, it is also undeniably true that there can be a parallel to other cult-like behaviors like JWs.