Jw's WILL go to war, according to their own publications. If one takes a close look, you will see that in the end JW's will be going to war with other "perfect" JW's. Follow this for a moment:
According to the WT the only ones to survive the GT are JW's, right?
"Armageddon will bring this wicked system of things to an end. Satan’s world will be out of the way, but the earthly part of Jehovah’s organization will survive."" ---http://wol.jw.org/en/wol/d/r1/lp-e/2014367?q=Armageddon&p=par
"Just as Noah and his God-fearing family were preserved in the ark, survival of individuals today depends on their faith and their loyal association with the earthly part of Jehovah’s universal organization."-http://wol.jw.org/en/wol/d/r1/lp-e/2006366?q=Are+You+Prepared+for+Survival&p=par
"The Bible also uses the term “ day of judgment ” to refer to the event that will bring the present system of things to its end. This day of judgment will come as suddenly as the Flood of Noah’s day , which swept away an entire wicked generation. Happily, the imminent destruction of “ungodly men” will clear the way for a new earthly society in which “righteousness is to dwell.”—Read 2 Peter 3:6, 7, 13." ---http://wol.jw.org/en/wol/d/r1/lp-e/2012645?q=judgment+day&p=par
"Jesus will judge people of all nations as sheep or goats when he comes during the great tribulation. Then, at Armageddon, the climax of the great tribulation, the goatlike ones will be ‘cut off’ forever" --http://wol.jw.org/en/wol/d/r1/lp-e/2013530?q=goatlike+ones&p=par
So who's left according to the WT after Armageddon? Just the JW's in the org.
OK, so now lets look at who these JW's are.
" However, not all will be willing to conform to God’s will. Isaiah 26:10 says: “Though the wicked one should be shown favor, he simply will not learn righteousness. In the land of straightforwardness he will act unjustly and will not see the eminence of Jehovah.” These wicked ones will be put to death permanently during Judgment Day.— Isaiah 65:20 .
By the end of Judgment Day, surviving humans will have “come to life” fully as perfect humans. (Revelation 20:5) Judgment Day will thus see the restoration of mankind to its original perfect state. (1 Corinthians 15:24-28) Then a final test will take place. Satan will be released from his imprisonment and allowed to try to mislead mankind one last time."----http://wol.jw.org/en/wol/d/r1/lp-e/1102005158
So the JW's will be restored to perfection, and only they have survived. What is this final test? Oh, that is where Satan is released to gather some of who is left after Armageddon (Perfected JW's remember) FOR WAR!
Revelation 20: 7 When the thousand years are completed, Satan will be released from his prison, 8 and will come out to deceive the nations which are in the four corners of the earth, Gog and Magog, to gather them together for the war; the number of them is like the sand of the seashore.
This false belief that they will not go to war is incorrect based on their own publications.