After hearing from those believe in God, The New Statesman asked various public figures why they chose atheism. The entire list is worth some time, but Maryam Namazie, a human rights activist, has a unique perspective:
I suppose people can go through an entire lifetime without questioning God and a religion that they were born into (out of no choice of their own), especially if it doesn't have much of a say in their lives. If you live in France or Britain, there may never be a need to renounce God actively or come out as an atheist. But when the state sends a "Hezbollah" (the generic term for Islamist) to your school to ensure that you don't mix with your friends who are boys, stops you from swimming, forces you to be veiled, deems males and females separate and unequal, prescribes different books for you and your girlfriends from those read by boys, denies certain fields of study to you because you are female, and starts killing indiscriminately, then you have no choice but to question, discredit and confront it – all of it. And that is what I did.