Darth Rutherford great points above, BOOM
Darth Rutherford
Simply point out that Watch Tower is an organization under heaven that has been given among men by which we must get saved. This is in direct conflict with the Holy Scriptures. A Witness may start squirming at this point or desparately say something to the effect that the name was divinely appointed or given; however, even so, it remains a name under heaven. No escaping that obvious point.
Try this verse:
NWT (Acts 11:26) 26 and, after he found him, he brought him to Antioch. It thus came about that for a whole year they gathered together with them in the congregation and taught quite a crowd, and it was first in Antioch that the disciples were by divine providence called Christians.
They were not called The Way, Bible Students or Jehovah's Witnesses. By Divine providence 'they' were called Christians. Who told Rutherford to change our 'name'? was it also by Divine providence? if they say 'Yes' or 'possibly' , then, can you explain Beth Sarim?