I think they shouldn’t legislate based on that. I have a suspicion that if certain strict sects of Islam (for example) tried to pass laws forcing you to do something you didn’t want to do, in order to comply with their religious belief, you’d feel quite differently.
We are not governed by the Bible, the Pope, the Mormon Prophet, or any Muslim cleric. We’re governed by the Constitution. The framers of the 14th Amendment made clear (in the debates in Congress at the time) that the amendment was meant to encompass things like whether or not to choose to have a family, and also bodily autonomy.
Christians are welcome to *believe* that abortion is sinful and awful and murderous and whatever. But is not unconstitutional and people who *don’t* believe it is murderous or sinful should have freedom to do constitutional things. That’s the thing about living in a country with freedom: some people are bound to use their freedoms in ways other people disagree with.