Wonder how many of these protesters are religious nuts?
Well this particular protest is sponsered by the American Life League which is a hard right Roman Catholic pro-life group.
According to Wiki:
ALL's mission is to end all forms of abortion without any exceptions for health, rape, incest, fetal abnormality, viability, or IVF.
Crusade for the Defense of Our Catholic Church [2] in which ALL seeks to persuade Catholics about its views on abortion, as well as expose pro-choice Catholic politicians who knowingly defy Church doctrine and statements by church officials, including Pope John Paul II, Mother Theresa, and Pope Benedict XVI. In 2004, ALL published a full-page advertisement in USA Today urging Catholic priests and bishops to deny Communion to Catholic legislators who support abortion rights.[1] The League's slogan in this matter is "You can't be Catholic and pro-abortion."
and:
ALL has also come under criticism for how it spends its donations. In the fiscal year ending in 2005,
ALL spent one third of its income on fundraising and administrative expenses, including almost 9% or $699,857 paid out to its CEOs, more than any other charity in the "public benefit" category.[5] In the fiscal year ending in 2007, $127,707 (1.89%) was paid out to its president Judie Brown