Here are some Watchtower quotes provided by dedalus from another thread that proves your point.
"Every kind of terror will be used to destroy the evil world--cloud bursts, lashing rains, overflowing floods, earthquakes, giant hailstorms and a rain of fire. There will be terror on the land, terror in the sea and terror in the air. With shocking surprise Armageddon will catch all those persons outside the New World society." -- From Paradise Lost to Paradise Regained, 1958, p. 207.
"On Satan's side will be all the rest of mankind, more than 99.9 percent, 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 making themselves friends of the world are making themselves enemies of God." -- Watchtower 10/15/58, p. 614-5.
"Do not conclude that there are different roads, or ways, that you can follow to gain life in God's new system. There is only one. There was just one ark that survived the Flood, not a number of boats. And there will be only one organization--God's visible organization--that will survive the fast-approaching ‘great tribulation.’ It is simply not true that all religion lead to the same goal … You must be part of Jehovah’s organization, doing God’s will, in order to receive his blessing of everlasting life." – You Can Live Forever in Paradise on Earth, 1982, p. 255.
"Never forget that only God’s organization will survive the end of this dying system. Act wisely, therefore, and make plans for life eternal by building your future with Jehovah’s organization." – Watchtower 7/15/84, p. 20.
"Only Jehovah’s Witnesses, those of the anointed remnant and the ‘great crowd,’ as a united organization under the protection of the Supreme Organizer, have any Scriptural home of surviving the impending end of this doomed system dominated by Satan the Devil. (Revelation 7:9-17; 2 Corinthians 4:4) They will make up the ‘flesh’ that Jesus Christ said would be saved through the worst tribulation in human history." – Watchtower 9/1/89, p. 19.
"The masses of people facing annihilation if they fail to respond to the good news include out unbelieving relatives, neighbors, workmates, schoolmates, and acquaintances. But our concern is to reach out to ‘all sorts of men’ in imitation of God, who manifested his love for the entire world by giving his Son, Jesus Christ, as a ransom for all (John 3:16). We must zealously invite all to flee to God’s place of safety. By fully carrying out the preaching work, we can avoid bloodguilt." – Kingdom Ministry, September 2000, p. 1