Atheist
As an atheist myself, that segment with the atheist woman complaining about the family that prayed before eating their meal in the restaurant made me want to slug her. I could see saying something if they loudly prayed for the entire meal but they were only saying grace for God's sake! If there really are atheists as rude as that actress...I've never met one.
Now I could definitely see Christians getting that rude if a Muslim family put down prayer rugs in the middle of a restaurant and started stretching and praying out loud but then I've never heard of Muslims in America doing anything so inconsiderate.