Jim Jeffries

Comedian

Jeffries is an Australian stand-up comic. [1]
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In a stand-up bit which was extremely critical of religion and religious people, Jeffries began with, "Here's the thing about people who believe in God...they're idiots!" [2]

People who believe in God are idiots

He also explicitly says that he is an atheist in a different routine about religion. "I'm not worried about dying because I'm an atheist." [3]

Jim Jeffries is an atheist