“What do you base this claim upon?”
Truth.
“Do you know the death rates of Christians at this time?”
I know about the number of Christians - about 1 million by A.D. 90 according to historians. That means the number of saints in Heaven when most or all of the New Testament books were written would be small and little known or reckoned on earth because of distances apart on earth, communications, persecutions and secrecy and so on.
Also, when one considers the need for final theosis on the part of many early Christians the numbers in Heaven would be even smaller than first considered between A.D. 30-90. Hence, early Christians were so willing to undergo martyrdom because it meant Heaven without need of any lengthy (for lack of a better term to describe a process after death) final theosis.
Sources please.
All Christians who have died ARE saints in heaven...