You're confusing agnosticism with atheism. Agnostics don't know and hence don't believe and don't disbelieve (Is there a God???). Theists actively believe (There is a God). Atheists actively disbelieve (There is no God). Theists and atheists both rely on their faith for their respective belief or disbelief. Only agnostics can claim to be without belief.
Yeah, I know that accusing an atheist of having faith is begging for a fight. Denial is not just another river in Egypt. That doesn't change the truth of it.
You are incorrect, and have fallen to a common misconception. Agnosticism deals with knowledge of God. There are agnostic theists and agnostic atheists. An agnostic atheists is one who lacks belief in God while recognizing that knowledge of God's existence is unattainable.
I would strongly urge you to actually do some research on the term "agnosticism" and what it actually means.
ag·nos·tic
aɡˈnästik/
noun
"a person who believes that nothing is known or can be known of the existence or nature of God ..."
I am an agnostic theist, as I believe in God, but I don't think knowledge of God is possible (in this life, at least). The misconception that one must either be a theist, agnostic, or atheist and they are mutually exclusive is prevalent, but incorrect.