If the New Testament is reliable, the name of Jesus is emphasized more than the name Jehovah in the New Testament.
If the New Testament is not reliable, and the name Jehovah was completely removed from all ancient manuscripts, God did not preserve His word.
This was one of the first conundrums I faced when I first allowed myself to challenge my own beliefs.
If as WT suggests, shadow groups have been able to alter Bible manuscripts by, for example, removing God's name from the NT, then what else might have they altered?