Assuming you're referring to the Catholic position, this is false. Women are automatically excommunicated the moment they commit or cooperate with the abortion. Popes have ruled that they can only gain forgiveness through their Bishops after penance and confession. Catholic concept of penance is not simply feeling sad, but actively taking steps to "right the wrong."
Whatever the case, the entire logic disproves the "All pro-lifers think women are blameless because women never understand what they are doing when they commit an abortion." If they're guilty of a sin, then they, by definition, are not blameless, and clearly the act of the abortion is not enough to absolve their punishment. The EO and other denominations follow the same logic, with pro-lifers, like Tony Miano, concluding appropriately about the fault of the mother:
http://crossencountersmin.com/featured-article/abortion-yes-murderers-should-be-punished/
Tony Miano is protestant, but quite clearly calls it a sin and states women should be liable for punishment.
Similarly, this Catholic, Trent Horn, from Catholic-answers, also argues for the punishment of women for abortion:
http://www.catholic.com/blog/trent-horn/should-a-woman-be-punished-for-having-an-abortion#_edn1
Although he recommends punishments as light as 1 or 2 years, and that punishment, like for any other crime, should be a case for case basis. He also reframes the argument from, "Should women be punished for having an abortion?" to "Should men and women be punished for killing their children?"
So, do Pro-lifers at large support this idiotic logic put forward by these people purporting to represent pro-lifers? No, not really. I've also seen the same reaction among pro-life groups across the internet, all favoring the punishment of women for breaking the law if abortion is made illegal.
There are no polls demonstrating this, but more than likely, more than half of pro-lifers side with this view, and the only people who don't are the Cruz supporters who have only discovered this issue over the past couple of weeks.
A woman’s “punishment” comes with the loss of her child
This is like saying, a woman who drowns her children in her bathtub is punished by watching them die.
You do realize that Planned Parenthood, for instance, does not tell the mother-to-be the side effects of an abortion. Nor is she provided an ultrasound with the image of her baby prior to the procedure.
This is entirely irrelevant since if a woman knows it is against the law to have an abortion, whether she appreciates that her unborn child is a child, she clearly knows she is breaking the law and, thus, should be punished. Furthermore, even ignorance of the law is no basis for being spared punishment from the law.
In my original commentary, I was speaking of the Sacrament of Confession for the sin of abortion. And Pope Francis, I believe, has now made it possible for any priest to forgive this grievous sin.
One thing regarding the links you sent [thank you!] right off the bat I didn’t like about Tony Miano is that he said, “To women who have aborted their children: yes, you are a murderer.”
To that, I say, gee, Tony, you look to be a bit out-of-shape. Maybe stop eating so much [through the sin of gluttony] and your heart will keep thumping and not let you down.
Tony does come back and he says women can be forgiven through Jesus, but that’s the message he might stay on from the beginning, to help women who are post-abortive and aching. They are the ones who can speak out the best to tell women, “Don’t do it. Don’t allow your children to be killed. You will regret it for the rest of your life.” (You will see these testimonies on the Silent No More website.)
Also, women do not [technically] murder their own children through abortion to begin with. They sign on the dotted line for someone else to do it, but they are not “retarded” for doing so, like I believe you called them, but they are oftentimes under the strain of coercion as I’ve previously mentioned, and not at all thinking things through. They are not given any light as to what they are actually doing, either, hence they become victims. The movie, “Blood Money,” explains how the abortion industry uses anxious women for their own financial gain.
Your second link made some good points, but bottom line, we need education for the women [and their men if they are still in the picture]. Jumping from 43+ years of legal abortion to putting women in prison [or whatever] for doing the same thing [now] hypothetically illegal, would have to be dealt with IF ever abortion is outlawed. (My guess is it would have to be a case-by-case basis.)
Many pro-life peoples pray everyday, though, that His Hand comes down on America and educates, encourages [or slaps] some sense into all of us.