I don't know what they believe. I am sure that any fair definition offered by a non-Jehovas Witness would be incorrect, especially if started with "monsters".
Here is what I do know:
I had a good friend, and co-worker in Hawaii that was a Jehovas Witness. A kinder, and more gentle man I have never encountered. He was quite literally honest to a fault. He was ridiculed & tormented daily(sort of the flavor pushed by this thread). He met each slight, slur, and insult with a smile and kindness.
As a living example, he was by far the most Christian person I have ever known.
The good actions of one member of the Jehovah's Witness group does not mean that their doctrine is Christian.
I was posing a theological question.. not a statement about an individual. If it is true that a person doesn’t think that Jesus was the Son of God... that religion is not Christian. No different than someone of the Jewish faith (who believe Jesus existed and was a prophet just not the Son of God). I am glad you made a great friend. He sounds like a wonderful person... if I only had friends that belonged to my specific faith, I would only have a handful of them. Instead, I have a large group of friends (Jewish, Wiccan, Agnostic etc). Each person is a good friend to me in different ways and I love each of them.