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The anti-abortion groups are not arguing from a scientific standpoint. They have never presented anything other then moral and religious arguments. As soon as we get a peer reviewed scientific study that says life begins at conception, they can use that as the basis for their argument.
I still think it should fail the establishment clause as being denied an abortion is very much being forced to adhere to a religious dogma that is not your own. (So IMO the "Abortion Ritual" direction the Satanic Temple has taken is interesting.) >

That’s like saying preventing people from stealing is making them follow the Ten Commandments >

No. The anti abortion stance in firmly rooted in religious belief. It all centers on life beinging at conception based on an interpretation of the bible. >

You can theoretically be anti-abortion and an atheist. Do they exist I mean I am sure at least one does. The government determining what views are and aren't based on religion is itself a violation of the establishment clause.