unless you believe that opposition to intentionally killing unborn children is based solely upon one's religious beliefs.
But I don't think any such belief is grounded in reality. There are atheists and secular people who are very pro-life, for instance.
https://www.theatlantic.com/family/archive/2019/01/march-life-secular-liberal-pro-lifers-feel-welcome/580837/
https://www.christianitytoday.com/ct/2022/december/pro-life-none-non-religious-secular-atheist-feminist-ally.html