@Ratti
((What do you mean How did we know that millions didn't have the heavenly hope?))
Good question.
I'll answer....
According to Watchtower:
1. What is the maximum number of Christians that have the heavenly hope?......... 144,000
2. How many non-anointed Christians were around before the twentieth century? ......Zero
3. What is the maximum number of anointed plus non-anointed Christians that could have existed prior to the twentieth century? .......less than 144,000 since some of the 144,000 are still with us today.
4. What does Watchtower identify those millions martyred for their faith in Christ prior to the twentieth century, as? ..... non-Christians
So, How do Jehovah's Witnesses know that millions who died for their faith in Christ prior to 1914 were professed but not real Christians?.....You tell me