Abortion is not a religious issue. It is merely correlated with religious beliefs. Many religions have no position on abortion, and even the Bible holds no clear position on it, it’s presence in Christianity is a secular synthesis.

“If you think the soul…”

SCOTUS also reaffirmed in every single pro-choice case (e.g Roe v Wade Casey v. PlannedParenthood ) that the government has a right to regulate abortion in general just not in certain cases. At no point was it ever considered to be enforcing religious beliefs. This has never been considered a religious issue by any but the most retarded people.