My definition of atheism is logical and reasonable.
Definitions are descriptions of what people mean when they use a word. I'm telling you that many people use the word atheist the way I do. That fact is what got that definition into dictionaries.
So are my observations about why so many atheists want to avoid my definition.
Your definition is too narrow and exclusive. It isn't useful to me. If I accepted it, I would have to say that I am not an atheist. That doesn't work for me.
But do you know who it does work for? Those trying to marginalize us by keeping our apparent numbers low. I'm guessing that only about 20% of people that do not believe in a god or gods fit your definition. Most of us seem to understand the limits of knowledge in this area including you and NoRightNoWrong, which is what makes us agnostics. You two choose to believe(I think), I don't.
Should I say that you're not a theist because you don't assert for a fact that gods exist? Is that a useful definition of theist? If not, why do you want to limit atheism to what many call strong atheism?
If you think my definition of atheism is wrong, then you should be able to offer better reasons for why that would be so.
I think I have, although I don't call your definition wrong as much as incomplete. An atheist is anybody that can truthfully answer "no" to the question, "Do you believe in a god or gods." My answer is no. If I did, I'd be a theist.
Being agnostic only means that we can't reach our decision regarding the existence of gods, through acquired knowledge. But we can still reach a decision, and lots of atheists and theists do so, in spite of this agnosticism.
My decision is suspend belief and active disbelief. That's what makes me agnostic.
your being an atheist or a skeptic does not rest on your agnosticism
Correct. My atheism rests on the twin convictions that I should have a rational reason to believe that gods exist and that I don't have one. My skepticism rests on the singular belief that all ideas should be questioned. My agnosticism rests on my understanding that I cannot rule the possibility of gods in or out.
I am defining atheism as what it is. You can define yourself however you want. But I won't allow for or play into anyone's lies, or delusions.
What do you imagine my lies and delusions are? That I don't believe in gods? That that position is called atheism?
I know what atheism is, and what it isn't. And it isn't agnosticism, nor is it open-minded skepticism. It's the conviction that no gods exist, and that "God" is an imaginary entity that occurs only in the minds of many human beings, but that exists nowhere else.
You're a linguistic prescriptivist. You want to insist that words only be used in prescribed ways.
Language is dynamic. We're always coining new words, and using old words in new ways. I choose to use the word in a more modern way. Your job is not to fight that, but to try to understand what people mean when they use a word, even if it's not the way you use it, and even if it needs to be defined for you. It's pointless to do anything else.