The Blaze reports on the controversy:
But wait, atheism is not a religion, right? So, how can anyone engage in unlawful "religious discrimination" against an atheist?...According to FFRF Co-President Annie Laurie Gaylor, Twins Florist, one of the businesses that refused to deliver, violated the Civil Rights Act when the business discriminated based on Ahlquist’s atheism. Gaylor released the receipt order from the florist, which reads, “I will not deliver to this person.”...
Gaylor goes on to whine:
Problem is, it's not illegal for a business to discriminate based on POLITICAL (or any other) belief. It's perfectly legal to refuse to serve Democrats, or Progressives or Communists...or atheists.“We have basic civil rights standards in our society. A business can‘t shun you because you’re an atheist,” the atheist leader said. “You do not have the right to refuse to do business with someone based on categories and that includes religion. It‘s as if they said ’I will not deliver to a black person.’”
The Civil Rights Act says that everyone shall be entitled to "full and equal enjoyment of the goods, services, facilities, privileges, advantages, and accommodations of any place of public accommodation, without discrimination or segregation on the ground of race, color, religion, or national origin."
Since atheism is not a religion, according to every atheist I've ever debated the subject with, it does not fall under the protection of the Civil Rights Act.
So, Gaylor, you're wrong, and people have every right to discriminate against and shun atheists, just like they can discriminate against and shun Communists or Marxists based on any category they choose OTHER THAN those specifically listed in the Civil Rights Act.
That, my dear, is called "freedom of (dis)association" and it's guaranteed by the First Amendment as a right.