ag·nos·tic (ag-nos?tik) noun
One who believes that there can be no proof of the existence of God but does not deny the possibility that God exists.
Agnosticism is the view that the truth value of certain claims—especially claims about the existence or non-existence of any deity, but also other religious and metaphysical claims—is unknown or unknowable.
a·the·ism (?the-iz´?m) noun
1. a. Disbelief in or denial of the existence of God or gods. b. The doctrine that there is no God or gods.
2. Godlessness; immorality.
Atheism, in a broad sense, is the rejection of belief in the existence of deities.
Anyone able to open a dictionary would know that, J. The Greek word agnosis (a+gnosis) simply means "un-knowledge"; being agnostic is a simple admission that one does not know; it's not an affirmation or a denial.
Now ignorance is a different word. The ignorant hate anything that is not just the way they see it, and all they want to do is destroy it.
Atheism is a belief that God does not exist and is the exact opposite of a belief that there is a God. The former denies it; the latter affirms it. Neither has any proof but they also have no decency to admit that ti is blind faith and nothing more.