The masters of spin were clever. The witnesses came before Christianity. Watchtower lifted the name Jehovah's Witnesses from the book of Isaiah. The prophet Daniel was one of Jehovah's Witnesses (in the Biblical, non-Watchtower sense). It was the prophets who told of the coming of the Messiah, Jesus Christ. Christianity is from Israel, from the faithful ones of the House of Jacob who bore witness to the fact that Jehovah (ie the God of Abraham, Isaac and Jacob whatever pronunciation you prefer) is the true God.
The Watchtower is apostate to Jehovah's Witnesses as defined by the prophet Isaiah.
(Isaiah 43:10-11) . . .YOU are my witnesses,” is the utterance of Jehovah, “even my servant whom I have chosen, in order that YOU may know and have faith in me, and that YOU may understand that I am the same One. Before me there was no God formed, and after me there continued to be none. 11 I—I am Jehovah, and besides me there is no savior. . .