No racism extends to beliefs as well. There is even a law that keeps people from being discriminated against religion but atheism is being debated as not a religion. Maybe if it was 90% of those laws would be removed...
RACEism.
If it's not a race, it cannot possibly be subject to Racism. Jews are a race, and thus can be subject to racism, Catholics are
not a race, and thus cannot.
Atheism is
not a religion, a religion is a series or set of beliefs concerning the cause, nature and purpose of the universe. Atheism is not a set of beliefs concerning the cause, nature and purpose of the universe, it is the denial of theism (theism being the belief in the existence of God or Gods).
That is all. Atheism does not say why the Universe is here, it does not seek to explain anything, all Atheism is is the denial of Theism, the denial of God or Gods.
A Religion says "This is why the Universe is the way it is.", Theism says "God\Gods exist." a Theist Religion says "The reason why the Universe is the way it is is because God\Gods made it that way.", Atheism says "God\Gods do not exist."
Don't get the three mixed up or you'll never be able to properly participate in any meaningful discussion, since you'll spend your entire time missing the point.