they seemed to have tied the generation to this scripture
Corinthians 15
In fact, also, those who fell asleep [in death] in union with Christ perished,. If in this life only we have hoped in Christ we are of all men most to be pitied. (NWT)
Commenting on this scripture in the book Man's Salvation Out of World Distress At Hand(1975 Watchtower), I believe we studied this book after 1975 probably 1976, it says on page 28.
So much depended upon Messiah's resurrection, and the apostle Paul had suffered so much persecution for preaching it, that if Paul were a liar, then, as he wrote...
So, too, with our generation in this twentieth century. 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..."