Sadly that JW does not realive that JEHOVAH(tm) is not their Father according to JW theology. They are merely imperfect humans doomed to death, with the prospect of becoming members of the GC by making it through the GT, whenever that happens... THEN, they earn the chance at the prospect of life if they pass the final test when JEHOVAH( tm) unleashes evil upon the world again. If they remain loyal to the ORG for the rest of this system, plus 1,000 years, they MAY be a son of JEHOVAH(tm).
For them to refer to GOD as thier Father is actually contrary to the expressed teachings of the WTBTS, and is therefore apostasy since apostasy is having a private belief contrary to "official" doctrine. This means that they deserve death. This also means that whoever approved that quote was associating with an apostate and approved an apostate teaching, and they deserve death as well.
DD