Jesus taught love for each other. The Watchtower actually teaches hate. Hatred of other religions, hatred of those who turn away from the WTS, hatred towards those who make money, hatred of large corporations other than themselves, hatred of politics, etc.
Teaching that they are the only way, and all others will be destroyed.
But you know what? Fine, everyone believe what they want. I have no problem with that. But don't destroy friendships and families. A true witness believer must alienate those around you that love you, and want to spend time with you, if they don't follow the teachings.
Ok, some will make the arguement, that the WTS doesn't care if you hang around your "wordly" relatives. Well, they sure don't advocate it do they? And God forbid if one of your friends or relatives turn their back on the WTS, then you cannot have anything to do with them.
The fact is, they want everyone to go to the meetings, and do so much witness activities from meeting attendance, to service, to studying, that they don't want you to have a life outside the organization. No time for tv, friends, family, nothing. Bury that head in the sand, only listen to them. They will make all decisions for you. Medical, who to hang with, who to marry, even telling you to watch out for the other brother and sisters, for they may actually not be very good association, though they are a witness.
Do I hear CULT?