Why must everyone be so obsessed with the credentials of who wrote an article instead of just taking the words themselves at face value? Whether it was Friedman or someone else who wrote that article, the content is clearly bogus regardless of who wrote it.
"Pro-Life" is a slogan to describe those who are anti-abortion. There is no more reason for that slogan to be taken totally literally than there is for someone who self-describes as "Pro-Choice" to also be required to support choice in healthcare funding, choice in paying or not paying taxes, or choosing which people they will accept as customers, or choosing to treat homosexual couples as married or not. The Pro-Choice crowd doesn't fully support the concept of personal choice on issues other than the right to choose to murder an unborn baby. Therefore, they have no moral right to demand that the Pro-Life crowd must support all life.