Just explaining my comment made earlier in the thread.
In my opinion, I think of the parable of the of the rich man and Lazarus. When we die could answer the question
As a witness I thought that those who serve the triune God die and expect to go to heaven but our hope was that we would not die of old age but live on into the thousand year reign of Christ surviving Armageddon. Our sacred service to our God I thought was primarily the preaching of the 'Good News' (Matthew 24:14) In Hebrews 10:23 "Let us hold fast the public declaration of our hope without wavering," (NWT) For me and my parents that hope was that we would survive the great tribulation and Armageddon and live on into the righteous conditions after these events. I believe that the first Watchtower publication that my parents studied Look I am making all things new makes this clear see the thread Another generation... (Im not able to link to it)
Our worship our sacred service in connection with God's eternal purpose would mean our salvation in judgement day. However my father lived his life as a Jehovah's Witness and died in his 80's longer than the national average I believe, he was active in the preaching and teaching and had served as an elder and pioneered at times. His older brother died at about the same time, he wasn't a witness. My understanding is that both of these have the hope of being included in the general resurrection. Which would lead one to conclude that my father's hope that he made and held 'fast the public declaration of our hope without wavering' was a false hope. Which in my opinion would then bring into question his sacred service, his worship of the one God and not the triune God. Which reminds me of 1 Corinthians 15:19 'If in this life only we have hoped in Christ we are of all men, most to be pitied' In the Watchtower publication "Man's Salvation Out Of World Distress At Hand" commenting on this verse on page 29 it says.
"After all that we have gone through since 1914, our generation would be, of all generations the "most to be pitied".Think of it, though! Worthy ones of this generation of mankind will be saved alive out of the rest of this world distress so as to survive the worst of it and enter into God's Messianic new system of things and not need a resurrection from the dead to life on earth! This is a valid hope well founded on what was said by Jesus Christ..."
When the apostle wrote this he was talking of the resurrection of Christ which was good news that he preached about and what it meant.
So having the evidence in my life of my father's public declaration of his hope and how it turned out I would question his religion as being Christian in my opinion.
However I agree that it is a matter of perspective.