I’ve hesitated whether to post on this thread or not, but here it is.
I’ll comment on two things here:
First, back when I wasn’t much of a believer and would sometimes hang out with people involved in atheist activism, it was quite often considered taboo or forbidden to be “pro-life”. Being pro-choice was the in thing, it was hip, and to defy that was to go against the grain and automatically branded you as against women’s rights, as someone living in the past, someone not sure about their atheism.
What happens here is that, perhaps, while some atheists are indeed pro-life (for non-religious reasons, obviously), publically
identifying as one can be seen as problematic, so many often prefer to keep it to themselves.
Second, since religion is quite often touted (perhaps more often than really necessary; the reasons that convince me to be pro-life aren’t even religious
) as arguments for the pro-life position, in the minds of many atheists, the movement is solely based on religious opinions and worldviews that may have little to do with actual, tangible reality.
I think these two reasons may be why it is observed that atheists tend to side more with the pro-choice worldview.
