In many ways it has been proven and posted by many members here.
It has been also demonstrated you are unable to grasp it, but are instead content to post your defective ideas.
In Jn3 it has been explained, it is literally, everyone believing, every believing one, everyone believing and continuing on in a believing condition.....even in some translations where they put the word whosoever......it is not by itself , but rather Whosoever believes.....that is NOT all men whoever lived.
So your posts are a direct and shameful denial of scripture, and a direct attack on believers who understand the scripture.