Here is even more explicit proof that the WTS teaches that only JWs will be saved.
*** w58 10/15 614-5 What Will Armageddon Mean for You? ***
As for humans upon earth, on the side of Jehovah will be all those fully dedicated to him and who are faithfully following Jesus Christ; compared with earth's billions these are indeed few. They are the few that walk the narrow way or cramped road that leads to life. These will not share in the fighting but will merely sing God's praises.-2 Chron. 20:20, 21; 2 Cor. 10:4, 5; Matt. 7:13, 14.
On Satan's side will be all the rest of mankind, more than 99.9 percent, even as we read: "The whole world is lying in the power of the wicked one." That includes all the governments of the world together with their supporters, the commercial, religious and social institutions. Even the professedly Christian organizations? Yes, because all such that are friends of the world are making themselves enemies of God.-1 John 5:19; Jas. 4:4.
Yes, today the earth is filled with wickedness, much innocent blood has been and is being shed, both in war and in peace. Godless men are persecuting Jehovah's servants and ruining the earth. Jehovah will express "indignation against all the nations" and "against all the inhabitants of the earth," because "there is nought but swearing and breaking faith, and killing, and stealing, and committing adultery." At Armageddon Jehovah "will cause justice to be done" speedily to "his chosen ones who cry aloud to him" because of being persecuted. At that time he will also "bring to ruin those ruining the earth."-Isa. 34:2; Jer. 25:30; Hos. 4:2, AS; Luke 18:8, 7; Rev. 11:18.
The 6 million or so dubs today represents 1/10th of 1 percent the world's population of 6 billion+. What more proof does you dub friend need?
Farkel