I think JWs are very similar. They also seek to control every aspect of their members' lives. They also exercise totalitarian control in the "JW society" they have created. While they do not act violently toward anyone right now, they do hate a lot of people. JWs teach the penalty for apostasy is death by Jehovah. The only reason why JWs can't create a Saudi Arabia of their own, is because there's not enough of them. Imagine a country where only JWs exist and the government is a theocratic JW government. Apostates, fornicators, gays and others would be killed just like they are today in extreme Muslims societies. If JWs had one billion adherents and shaped society, they'd have the power to do some horrific shit.
Plus, they do some horrific shit today. There were actually almost a dozen cases (that I know of) of JWs dying because of refusing a blood transfusion just in the past couple of years in my country (we also have about 40,000 JWs). An 18 year old girl died after getting into a traffic accident because her parents refused to allow the doctors to give her a blood transfusion.There are what, 8 million JWs worldwide? That means thousands (maybe more) of deaths every single year because of refusing blood transfusions. If you think about it, JWs kill more people than terrorists. Only nobody cares in mainstream society. How many people have died in the past 50 years due to their policies or vaccines, organ transplants and blood transfusions?