"Atheist Religion" sounds strange. How could a belief that there is no god be a religion? The operative word is "belief," otherwise called faith. The belief that there is no god is even harder to prove than the belief that there is a god. God has to show up once to prove that s/he exists. To prove that there is no god means showing that for every possible concept of god and every possible time period and every possible place, god does not exist.
When you hear people strongly asserting their conviction that there is no god and proselytizing converts to their view, you may be hearing "radical religious nuts" at work. To me, the only intellectually honest position is agnosticism, "I don't know." God has not spoken to me directly, and if He has, I'm not telling you or those nice young men in their clean white coats who are coming to take me away (ala Dr. Demento.)
Atheist Religious Nuts do a huge disservice to the teaching of science. Most people believe in God. When the Atheist Religious Nuts proselytize by trying to prove through science that there is no god, they convince God's believers that science is an Atheist black art that should be avoided. What a tragedy. Science is the process of puzzling out how the universe works, regardless of how or by whom it was created.
To those of faith, God fearing or Atheist, "Remember when you are speaking of God, she's black." Can you prove otherwise?