The story of Noah's flood gives some indication as to how Jehovah deals with those who refuse to get on his boat.
I really did believe that all non-JWs would be slaughtered at Armageddon. This would have included tens of millions of Asian children.
Revelation 14:20, "They were trampled in the winepress outside the city, and blood flowed out of the press, rising as high as the horses' bridles for a distance of 1,600 stadia."
As a point of contrast, the fate of these non-believers in WT theology is much more kind than the fate offered by many Evangelical and Calvinist denominations: an eternity of pain and torment. Jehovah only wants to slit your throat. Jesus will roast you forever and ever, for all eternity.
To be fair, however, much of Christendom rejects this view of God. They teach that only those who *want* to go to Hell, will go to Hell.