Here is a question I’ve seen posed many times and in many ways when it comes to abortion (or marriage, for that matter):
“Why is it that the United States is one of the very few countries where large numbers of people insist that their religious views become the law of the land?” (Source)
Answer: because the religious view is the just view.
Don’t defend your “religious” beliefs directly. Go straight to justice. Make it an argument about justice, and how your religious views on the matter uphold justice better than the alternatives. That is one of the points of religion, after all. See, for example, Micah 6:8:
He has showed you, O man, what is good;
and what does the Lord require of you
but to do justice, and to love kindness,
and to walk humbly with your God?
God cares very much about justice, so make the argument about justice.