It’s an individual choice and to say anything is normal would be a good but to come to an agreement with is we think differently about. We all are different and have our different thoughts and beliefs. People can be emotional opinionated about different most times are afraid of what they don’t understand. And if atheist is normal? It is for the atheist and I’ve learned that after death they will not be atheist anymore and if the individual who is atheist have a great personality I would say that it is normal depending on how they act as acceptance of the person will also decide if normal too.