a6d5736f_nts_Pro___Con___Choice_Matters__Anti_Choice__RTL_
[Pro-choice] Abortion is a religious issue, because the basis of opposition to abortion is the theological question of when personhood begins. Organized religion, primarily the Catholic Church and the “religious right,” is the backbone of the anti-abortion movement and is a cause for great concern among pro-choice religions, who see anti-abortion laws as a violation of religious liberty. [Anti-Choice (RTL)] 
Pro-abortionists are turning the abortion issue into a religious was by saying that the opposition to abortion comes from religious groups trying to foist their beliefs on the nation.
Legal Abortion: Arguments Pro & Con - Choice Matters
Anti-Choice (RTL)