"The real basis of the claim of state interest in the foetus is a doctrinaire “moral” concern for the “potential of independent human existence.” The theoretical moral concern is effected only by permitting a greater moral outrage: the deep human suffering of adults and children alike, that results from compelling one to continue an unwanted pregnancy, to give birth to an unwanted child, and to assume the burdens of unwanted parenthood. To many minds the “moral” concern for the foetus is misplaced. Reflective judges, scholars and commentators have perceived and deplored the fact that religious beliefs underlie the retention of abortion laws.... No argument is needed to show that the police power cannot be employed in the service of sectarian moral views without violating the Establishment Clause of the First Amendment...."