"What will happen to young children at Armageddon? The Bible does not directly answer that question, and we are not the judges. However, the Bible does show that God views the young children of true Christians as "holy." (1 Cor. 7:14) It also reveals that in times past when God destroyed the wicked he likewise destroyed their little ones." - Reasoning from the Scriptures pp.47-48
"Children are affected by the course of their parents, and parents are warned that their iniquity is visited on their offspring unto the third and fourth generation. (Ex. 20:5, 6) Parents are commanded to instruct their children in God's way, and if in these last days parents refuse to heed the divine instruction and warning they bring destruction upon themselves and their small children at Armageddon. (Deut. 6:6, 7; Eph. 6:4) According to justice God can leave such children dead, for, as Ezekiel showed, all die in their iniquity." - Watchtower 1950 Nov 15 p.463
"By all the evidences this system of things is hastening to its final confrontation with the God of justice at Armageddon. Parents and children who fail to gain the "mark on their foreheads," that is, an adequate appreciation of God's moral standard, are sure to suffer. Parents will be held accountable for their children, and children will suffer for the failure of their parents." - Watchtower 1968 Feb 1 pp.83-84
Not only that, but according to official doctrine the survivors will be sorted into scouting teams and “rejoice” in spending seven months burying the rotten corpses of babies, children, men and women - including the disabled and mentally ill:
With such a glorious feast of victory concluded, only the bones, bones from one end of the earth to the other, will be left for burial. What a task that will be for the survivors, to cleanse the earth of every remaining evidence of Gog’s forces! Even with the work well organized it will take seven months, Jehovah says, just to bury the bones. Scouting corps will be sent out on a full-time basis to search the land thoroughly and, when bones are found, markers will be set up for those with the spades and shovels who follow. Those privileged to share in that cleanup work will not view it as a revolting and disgusting assignment but will rejoice to be alive when Gog’s long and oppressive rule has come to an end and when the wicked are no more. Survivors of Armageddon will be happy and will greatly rejoice to have a share in preparing the earth for a global paradise of beauty and perfection under the reign of the King Christ Jesus. - Watchtower, 1 August 1956, page 465, para. 17[2]
To Jehovah’s Witnesses, this slaughter of 99.89% of humans alive today is considered a good thing and something they actually look forward to and pray for.
For those in opposition to Jehovah, it will be extremely confusing and terrible. - Michael Philipp
Through his son Jesus he will remove all wicked people and those who listened to and followed all the false religions and all the governments to allow all those exercising faith in his son’s ransom sacrifice to live forever in paradise on earth along with the billions who will be restored to life. - Stephen Macready
He will unleash the Army of the heavens. He is Jehovah of Armies! Jesus is coming with his powerful angels. The faithful and true 144,000 kings will be in the fight. Jesus will carry out his mission more pinpoint than any man made weapons of destruction. Mere toys they will be. Who will survive? The ones that Jehovah wants to save and protect. - Reggie Hammons (By all means, read his full answer. It’s almost orgasmic in anticipation of the coming genocide).
This is the message Jehovah’s Witnesses are supposed to be warning you about. This is the message Jehovah’s Witnesses claim you’re rejecting.
But most people are unaware that Jehovah’s Witnesses actually believe this, because they aren't “warning you about this” at all.
They don't tell you this message straight up. Instead they ask you some generic question about Jesus or the bible in general. Because if they told you all of this at the door you'd likely think it's a mad cult or something.