I don't surf, but I have no desire to go to a conference in Utah to meet other non-surfers and discuss the joys of not surfing.
These atheists are not just those without a belief in God. They actually do have an ideology and a theology, which is an ideology of being hostile to religion.
These are the people who file lawsuits to tear down crosses from mountaintops, because they are offended. These are the people who file lawsuits to take “under God” out of the Pledge of Allegiance. These are the people who file lawsuits over prayers at graduations and city council meetings.
Some atheists are happy to just live and let live, but there are organized atheist groups, dedicated to shoving their agenda down out throats. These groups are dedicated to cleansing the public sphere of any mention of religion in any form.