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A person who holds the view that organized religion when considered throughout the centuries has been a destructive force in society, wrongly believed is that all are also agnostics or atheists, but a great number of faithful theists also see organized religion as harmful to society and choose to follow their own path to god.
when considering the crusades, September the 11th, the holocaust and the Spanish inquisition the anti-theist concluded that religion had caused great harm to society.
by hairy_palms May 17, 2007
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Actively opposes a belief in gods of any sort and to institutions built around belief in a deity. They believe that religion is harmful to individuals and society and that it impedes scientific progress and encourages immoral acts.
An anti-theist may see religious harm in the brainwashing of children, faith healing, circumcision, holy wars, terrorism, the inquisition, blood sacrifice, and discrimination against homosexuals and women.
by kookycole May 26, 2012
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An antitheist is one who is strongly apposed to the belif and following of theism and belives that it is detremental to society. More or less a hardcore atheist.
by Mr.Universe November 27, 2005
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One who not only rejects the existence of God(s) but in addition opposes organised religions, especially monotheisms of Abrahamic tradition, believing them to be inherently deleterious to the human condition. With particular regard to human rights, scientific progress, education, democracy, public health and individualism.
The reasons for my anti-theist belief are numerous, but the most important of these is the incompatibility of verifiable empirical fact and untestable articles of blind faith, rendering wilful misinformation, as being the most serious offence of theism.
by Corvusmox July 23, 2017
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A person {often, but not always an atheist } who believes religion and/or theism to be a detriment to society

an active atheist, usually publicly denouncing religion, theism, and churches/mosques

Someone with a brain
"Hey, I'm an antitheist"

"What? I thought you were an atheist.."

"I am both! I both lack a belief in a god AND oppose religious institutions"
by That Humanist Chick September 23, 2009
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Any person who sees some harm caused on some level that stems from religion. Not a meaner atheist or an in-the-closet Christian, just somebody who opposes some aspect of religion.
Anti theist: I consider myself an anti theist.

Christian Fundamentalist: you are one of those mean atheist. You are a satanist!

Anti Theist: Iโ€™m actually agnostic. I just hate all of that anti gay shit and I think that we shouldnโ€™t be teaching our kids to be scared shitless of hell.
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Antitheism is an opposition to theism, an antitheist is one who practices antitheism.
Doug is an Antitheist he opposes theism because it postulates an unverifiable hypothesis.
by Donquixote June 15, 2012
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