There is more verifable evidence; evidence that just recently has been declassified, that there are alien life forms than there is information to sustain the claim of "angels" and "demons" and "god".
Where is heaven located? I can point up to the sky and show you where other planets are located.
Is it possible that the angels/demons are things we call them as humans because the true accounts were too much for a species that have been reared to think of themselves as a superior species? Here's a tidbit: we are not.
In the next 10 years it will become a truism that we will not be able to escape and our whole idea of religion, aliens/demons and gods will be totally turned on its head.
I don't have all the answers, but I am not afraid to face the hard questions...