Reasons for being an Atheist

[Simsim]

I came out to one of my family members today and as we talked she made the generalization that atheists turn doubt their belief in God when they are exposed to traumatic events and that some others may be just rebelling against their upbringings.

The question that I have is that, as an atheist, do these things have any real effect on what they believe to be true ( That God isn't real) or if these concepts are just irrelevant?

I don't really find a problem in what she said. We, humans, form our opinions, viewpoints and ideologies through our sufferings. So why should atheism be an exception?

One who finds God so callus has the right to doubt his mercy then to doubt his existence. Why should one stick to an experimentally falsified idea about merciful God??? This may be the spark of atheism in many cases, but it is not the reason that atheists hold atheism. This spark is the beginning of the walk-up but it is not the motivation behind keeping walking up.