If the use of God's name was so important and the identifying mark of a true christian, why is it that Jesus never used it?
Jw's use it in every sentence but Jesus talked about his Father, prayed "our Father in the heaven", when he was dying on the cross or stake, he called on his Father and not on Jehovah.
Look at all the writers in the New Testament, how many of them used God's name in their writing as often as the Watchtower does?
By the divine providence the book of Acts says that early followers of Christ were to be called Christians and not Jehovah's Witnesses.
If the Creator could creat the billions of galaxies, he could have it made clear to us if his name was truly critical for his approval.