Well, how many people can pat their head, rub their belly, dance the Macarena and whistle Dixie all at the same time? This just makes them unique, not right. By that criteria, all religions are "right".
For all Orthodox Christians, there's a short creed that all agree to, even if forms and manner of worship may be different. A committee got together and agreed, if all follow this creed, they are Christian. If they don't, they're something else.
There's no similar creed for the Jehovah's Witnesses. The closest I've found is the (what, 200?) baptismal questions, which also include admonitions towards personal hygiene. Is a Jehovah's Witness who fails to wash his hands after attending the bathroom then shakes your hand, no longer a Jehovah's Witness?
Preaching the message? There's the Jesus Film project, Gideons, and others. They are superior because they share the bible, unadulterated.
Wherever you, go, you get the same "loving" treatment. There's Hostelling International and McDonald's.
Follow the bible the best they can. The Seventh Day Adventists are more rigorous in this regard.
Don't celebrate "pagan" holidays. You mean, like Mother's Day? There are other cults that abstain from holidays. They are wrong. Refusing to celebrate in annual family events further isolates the cultist and alienates them from family and friends. Generational JW's understand that this rule is ridiculous and find ways around it, like having a "special day" for their child close to their birthday.