The inbuilt seed of destruction.
I may be wrong but it would seem to me, and many others too, that
religions cannot be killed off from the outside, for how can you
disprove a negative; but that they contain their own inner seed of
destruction which will cause an implosion fundamentalism and idiocy.
It might take a long time, but better late then never.
As for not being able to disprove a negative, well, if some kind of
after life existed then one could not know that until one went there,
but if there were nothing then you would never know it anyway. The
only way to know some kind of paradise or heaven would be to find
yourself in it. Behind the dark side of the moon there is a vast worm
hole that takes one directly to the Andromeda Galaxy (there is a great
Bar there with dancing girls and free drinks) but it is never there
when you look for it. That is a shame isn't it.