Thank you for this, Jesuis. I believe I understand where you are coming from - seems close to Buddhist Enlightenment. I would like to focus on this particular sentence, with respect to the title you gave to this thread.
We know through being taught and through experiencing it. Not until we really know can we say we know anything.
Inserting this into your topic title, what you appear to be saying is:
"Theists know god through their experiencing of it. Atheists do not know god, because they have not had that experience."
On the face of it, a reasonable statement - comparable to your lesson of the sugar: you cannot know
sugar without experiencing it.
But can you understand that an AWFUL lot of the resistance to what you are saying - and the refusal to accept your claim that you are an atheist - lies exactly there? Your "factual statement" that "theists KNOW god" (through experience) seems to be entirely accepting of the notion that there is, in fact, a god to know (same as there is, in fact, sugar to taste).
You claim to be atheist, but make a statement that you claim is fact, that there is a god that can be experienced.
Take a step back and honestly answer: can you understand why you are getting so much pushback on this subject?