People have to be incredibly naive to believe there is anyone in the legal profession that doesn't have an opinion on abortion, or that a single politician is not applying a litmus test to judicial nominees on this most critical of issues.
Either that or they are simply being disingenuous.
Having an opinion and sticking it where it doesn't belong are two different things. I am convinced that Justice Scalia restricts himself to applying the law. In this case, I believe as a justice he would defer the question of abortion to the states, based on constitutional law, not based on whatever his personal opinion on abortion is.
If you want to say that a person with enough integrity and ethics to do his job responsibly is a rarity, you can say that. I have no data on the subject. I maintain that ethical jurists with integrity are what's needed. Not pro-life activists.